CHAPTER 14 PORT FUNCTION
User’s Manual U13850EJ4V0UM
400
(1) Functions of P7 and P8 pins
Port 7 is an 8-bit input-only port and port 8 is a 4-bit input-only port.
The pin statuses can be read by reading the port 7 and 8 registers (P7 and P8). Data cannot be written to P7 or
P8.
A software pull-up function is not implemented.
Values read from pins specified as analog inputs are undefined values. Do not read values from P7 or P8 during
A/D conversion.
(2) Block diagram (Ports 7 and 8)
Figure 14-32. Block Diagram of P70 to P77 and P80 to P83
Pmn/ANIx
RD
Internal bus
Remarks 1.
RD:
Port 7, port 8 read signals
2.
m = 7, 8
n = 0 to 7 (m = 7), 0 to 3 (m = 8)
x = 0 to 7 (m = 7), 8 to 11 (m = 8)
Содержание MPD703030A
Страница 2: ...User s Manual U13850EJ4V0UM 2 MEMO ...
Страница 514: ...User s Manual U13850EJ4V0UM 514 MEMO ...