W78E516DDG Datasheet, PDF (26/90 Pages) Nuvotem Talema – 8-BIT MICROCONTROLLER

W78E516D/W78E058D Data Sheet
Serial Data Buffer
Bit: 7
6
5
4
3
2
1
0
SBUF.7 SBUF.6 SBUF.5 SBUF.4 SBUF.3 SBUF.2 SBUF.1 SBUF.0
Mnemonic: SBUF
Address: 99h
BIT NAME FUNCTION
7~0 SBUF
Serial data on the serial port is read from or written to this location. It actually
consists of two separate internal 8-bit registers. One is the receive resister, and
the other is the transmit buffer. Any read access gets data from the receive data
buffer, while write access is to the transmit data buffer.
Port 2
Bit: 7
P2.7
Mnemonic: P2
BIT NAME
7-0 P2.[7:0]
6
5
4
3
2
1
0
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
Address: A0h
FUNCTION
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.
Interrupt Enable
Bit: 7
6
5
4
3
2
EA
-
ET2
ES
ET1
EX1
Mnemonic: IE
BIT NAME
FUNCTION
7 EA
Global enable. Enable/Disable all interrupts.
6-
Reserved
5 ET2
Enable Timer 2 interrupt.
4 ES
Enable Serial Port 0 interrupt.
3 ET1
Enable Timer 1 interrupt.
2 EX1
Enable external interrupt 1.
1 ET0
Enable Timer 0 interrupt.
0 EX0
Enable external interrupt 0.
1
0
ET0
EX0
Address: A8h
P4.2 Base Address Low Byte Register
Bit: 7
6
5
P42AL.7 P42AL.6 P42AL.5
Mnemonic: P42AL
4
P42AL.4
3
P42AL.3
2
P42AL.2
1
0
P42AL.1 P42AL.0
Address: ACh
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