HD6433802H Datasheet, PDF (168/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

3. Port pull-up control register 6 (PUCR6)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PUCR6₇ PUCR6₆ PUCR6₅ PUCR6₄ PUCR6₃ PUCR6₂ PUCR6₁ PUCR6₀
0
0
0
0
0
0
0
0
R/W
R/W R/W
R/W R/W R/W
R/W R/W
PUCR6 controls whether the MOS pull-up of each of the port 6 pins P6₇ to P6₀ is on or off. When
a PCR6 bit is cleared to 0, setting the corresponding PUCR6 bit to 1 turns on the MOS pull-up for
the corresponding pin, while clearing the bit to 0 turns off the MOS pull-up.
Upon reset, PUCR6 is initialized to H'00.
8.5.3 Pin Functions
Table 8.12 shows the port 6 pin functions.
Table 8.12 Port 6 Pin Functions
Pin
P6₇/SEG₁₆ to
P6₀/SEG₉
Pin Functions and Selection Method
The pin function depends on bit PCR6n in PCR6 and bits SGS3 to SGS0 in
LPCR.
P6₇ to P6₄
SEG3 to SEGS0
Other than 0100, 0101, 0110, 0111,
1000, 1001, 1010, 1011
(n = 7 to 4)
0100, 0101, 0110,
0111, 1000, 1001,
1010, 1011
PCR6_n
Pin function
0
P6_n input pin
1
P6_n output pin
*
SEG_n+9 output pin
P6₃ to P6₀
SEG3 to SEGS0
PCR6_m
Pin function
Other than 0011, 0100, 0101, 0110,
0111, 1000, 1001, 1010
0
P6_m input pin
1
P6_m output pin
(m = 3 to 0)
0011, 0100, 0101,
0110, 0111, 1000,
1001, 1010
*
SEG_n+9 output pin
*: Don’t care
150