upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 144

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

(2)
Remarks: 1. Input mode:
144
Symbol
Symbol
P9H
R/W
R/W
P9L
Registers
(a) Port register 9 (P9)
Port register 9 (P9) is a 16-bit register used to control pin level read and output level write.
This register can be read and written in 8-bit and 1-bit units.
However, when using the higher 8 bits of the P9 register as the P9H register and the lower 8 bits
as the P9L register, P9 becomes two 8-bit registers for which I/O can be manipulated in 8-bit or
1-bit units.
P915
R/W
R/W
2. An undefined value (pin input level) is read for the value after reset when P9 is read in
P97
15
7
Output mode:
the input mode. When P9 is read in the output mode, 00H (output latch value) is output.
P9n
0
1
P914
R/W
R/W
P96
14
6
Outputs 0
Outputs 1
P913
R/W
R/W
Figure 4-42: Port Register 9 (P9) Format
P95
13
5
When port 9 (P9) is read, the pin levels at this time are read. During
write, the data written to P9 is written. This does not affect the input
pins.
When port 9 (P9) is read, the value of P9 is read. During write, the
value is written to P9 and the written value is immediately output.
Output data control (in output mode) (n = 0 to 15)
User’s Manual U16702EE3V2UD00
Chapter 4 Port Functions
P912
R/W
R/W
P94
12
4
P911
R/W
R/W
P93
11
3
P910
R/W
R/W
P92
10
2
R/W
R/W
P99
P91
9
1
R/W
R/W
P98
P90
8
0
FFFFF413H undefined
FFFFF412H undefined
Address
Address
After reset
After reset