HD6473837H Datasheet, PDF (186/562 Pages) Renesas Technology Corp – Hardware Manual

Upon reset, PDR9 is initialized to H'00.
Port Control Register 9 (PCR9)
Bit
Initial value
Read/Write
7
PCR9₇
0
W
6
PCR9₆
0
W
5
PCR9₅
0
W
4
PCR9₄
0
W
3
PCR9₃
0
W
2
PCR9₂
0
W
1
PCR9₁
0
W
0
PCR9₀
0
W
PCR9 is an 8-bit register for controlling whether each of the port 9 pins P9₇ to P9₀ functions as an
input or output pin. Setting a PCR9 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR9 and in PDR9 are valid only
when the corresponding pin is designated in bits SGS3 to SGS0 in LPCR as a general I/O pin.
Upon reset, PCR9 is initialized to H'00.
PCR9 is a write-only register. All bits are read as 1.
8.10.3 Pin Functions
Table 8.27 shows the port 9 pin functions.
Table 8.27 Port 9 Pin Functions
Pin
P9₇/SEG₄₀/CL₁
Pin Functions and Selection Method
The pin function depends on bit PCR9₇ in PCR9, and bits SGX and SGS3 to
SGS0 in LPCR.
SGS3 to SGS0
0000
Not 0000
*
SGX
0
0
1
PCR9₇
Pin function
0
P9₇ input
pin
1
P9₇ output
pin
*
SEG₄₀ output
pin
*
CL₁ output
pin
P9₆/SEG₃₉/CL₂
The pin function depends on bit PCR9₆ in PCR9, and bits SGX and SGS3 to
SGS0 in LPCR.
SGS3 to SGS0
0000
Not 0000
*
SGX
0
0
1
PCR9₆
Pin function
0
P9₆ input
pin
1
P9₆ output
pin
*
SEG₃₉ output
pin
*
CL₂ output
pin
Note: * Don’t care
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