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KS152JB Universal Communications Controller
Technical Specifications
Kawasaki LSI USA, Inc. Page 117 of 120 Ver. 0.9 KS152JB2
The SBUF sfr is set to 00h by a reset.
There is unrestricted read/write access to this SFR.
PORT 2
P2.7-0 Non-multiplexed address bus A15-A8: The port latch cannot be used for general I/O
purposes but exists to support the MOVX instructions. Port 2 data will only be
brought out on the P2.7-0 pins during indirect MOVX instructions.
The P2 sfr is set to FFh by a reset.
There is unrestricted read/write access to this SFR.
PORT 3
P3.7-0 General purpose I/O port. Each pin also has a alternate input or output function. This
alternate function is enabled if the corresponding port latch bit is set to 1, else the port
pin will remain stuck at 0.
P3.7
RD Strobe for read from external RAM
P3.6
WR Strobe for write to external RAM
P3.5 T1 Timer/counter 1 external count input
P3.4 T0 Timer/counter 0 external count input
P3.3
INT0 External interrupt 1
P3.2
INT1 External interrupt 0
P3.1 TxD Serial port output
P3.0 RxD Serial port input
The P3 sfr is set to FFh by a reset.
There is unrestricted read/write access to this SFR.
PROGRAM STATUS WORD
P2.6
6
P2.5
5
P2.3
3
P2.7
7
P2.2
2
P2.1
1
P2.0
0
P2.4
4
Bit:
Mnemonic: P2 Address: A0h
P3.6
6
P3.5
5
P3.3
3
P3.7
7
P3.2
2
P3.1
1
P3.0
0
P3.4
4
Bit:
Mnemonic: P3 Address: B0h
AC
6
F0
5
RS0
3
CY
7
OV
2
F1
1
P
0
RS1
4
Bit:
Mnemonic: PSW Address: D0h