W77M032A Datasheet PDF - nuvoton
| Part Number | W77M032A | |
| Description | 8-BIT MICROCONTROLLER | |
| Manufacturers | nuvoton | |
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W77L32/W77L032A/W77M032A
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION.......................................................................................................... 3
2. FEATURES ................................................................................................................................. 3
3. PIN CONFIGURATIONS............................................................................................................. 4
4. PIN DESCRIPTION..................................................................................................................... 5
5. FUNCTIONAL DESCRIPTION.................................................................................................... 6
5.1 I/O Ports .......................................................................................................................... 6
5.2 Serial I/O ......................................................................................................................... 6
5.3 Timers ............................................................................................................................. 7
5.4 Interrupts ......................................................................................................................... 7
5.5 Data Pointers .................................................................................................................. 7
5.6 Power Management........................................................................................................ 7
5.7 On-chip Data SRAM ....................................................................................................... 7
6. MEMORY ORGANIZATION........................................................................................................ 8
6.1 Program Memory ............................................................................................................ 8
6.2 Data Memory................................................................................................................... 8
6.3 Special Function Registers ........................................................................................... 10
7. INSTRUCTION.......................................................................................................................... 27
7.1 Intruction Timing ........................................................................................................... 35
7.1.1 MOVX Instruction .......................................................................................................... 38
8. POWER MANAGEMENT.......................................................................................................... 43
8.1 Idle Mode ...................................................................................................................... 43
8.2 Economy Mode ............................................................................................................. 44
8.3 Power Down Mode........................................................................................................ 45
9. RESET CONDITIONS............................................................................................................... 46
9.1 External Reset .............................................................................................................. 46
9.2 Watchdog Timer Reset ................................................................................................. 46
9.3 Reset State ................................................................................................................... 46
10. INTERRUPTS ........................................................................................................................... 48
10.1 Interrupt Sources .......................................................................................................... 48
10.2 Priority Level Structure.................................................................................................. 48
10.3 Interrupt Response Time .............................................................................................. 50
11. PROGRAMMABLE TIMERS/COUNTERS................................................................................ 51
11.1 Timer/Counters 0 & 1.................................................................................................... 51
11.2 Time-base Selection ..................................................................................................... 51
11.2.1 Mode 0 ........................................................................................................................ 52
Publication Release Date: April 17, 2007
- 1 - Revision A6
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W77L32/W77L032A/W77M032A
4. PIN DESCRIPTION
SYMBOL
EA
TYPE
DESCRIPTIONS
I EXTERNAL ACCESS ENABLE: It should be kept low.
PSEN
O PROGRAM STORE ENABLE: PSEN enables the external ROM data onto the Port 0
address/data bus during fetch and MOVC operations.
ALE
O
ADDRESS LATCH ENABLE: ALE is used to enable the address latch that separates
the address from the data on Port 0.
RST
I
RESET: A high on this pin for two machine cycles while the oscillator is running resets
the device.
XTAL1
XTAL2
I
CRYSTAL1: This is the crystal oscillator input. This pin may be driven by an external
clock.
O CRYSTAL2: This is the crystal oscillator output. It is the inversion of XTAL1.
VSS I GROUND: Ground potential
VDD I POWER SUPPLY: Supply voltage for operation.
P0.0 − P0.7
I/O
PORT 0: Port 0 is an open-drain bi-directional I/O port. This port also provides a
multiplexed low order address/data bus during accesses to external memory.
PORT 1: Port 1 is a bi-directional I/O port with internal pull-ups. The bits have alternate
functions which are described below:
T2(P1.0): Timer/Counter 2 external count input
T2EX(P1.1): Timer/Counter 2 Reload/Capture/Direction control
RXD1(P1.2): Serial port 1 RXD
P1.0 − P1.7 I/O TXD1(P1.3): Serial port 1 TXD
INT2(P1.4) : External Interrupt 2
INT3 (P1.5): External Interrupt 3
INT4(P1.6) : External Interrupt 4
INT5 (P1.7): External Interrupt 5
P2.0 − P2.7
I/O
PORT 2: Port 2 is a bi-directional I/O port with internal pull-ups. This port also provides
the upper address bits for accesses to external memory.
PORT 3: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have alternate
functions, which are described below:
RXD(P3.0) : Serial Port 0 input
TXD(P3.1) : Serial Port 0 output
INT0 (P3.2): External Interrupt 0
P3.0 − P3.7 I/O INT1 (P3.3): External Interrupt 1
T0(P3.4) : Timer 0 External Input
T1(P3.5) : Timer 1 External Input
WR (P3.6) : External Data Memory Write Strobe
RD (P3.7) : External Data Memory Read Strobe
PORT 4: Port 4 is a 4-bit bi-directional I/O port. The P4.0 also provides the alternate
P4.0 − P4.3 I/O
function WAIT which is the wait state control signal.
* Note: TYPE I: input, O: output, I/O: bi-directional.
Publication Release Date: April 17, 2007
- 5 - Revision A6
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| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ W77M032A.PDF Datasheet ] | |
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