HD64F2149 Datasheet, PDF (298/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Port E and port F Nch-OD Control Registers (PENOCR, PFNOCR)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PE7NOC PE6NOC PE5NOC PE4NOC PE3NOC PE2NOC PE1NOC PE0NOC
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PF7NOC PF6NOC PF5NOC PF4NOC PF3NOC PF2NOC PF1NOC PF0NOC
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PENOCR and PFNOCR are 8-bit read/write registers, the individual bits of which specify the
output driver type for pins on ports E and F which are configured as outputs.
Setting a PENOCR or PFNOCR bit to 1 disables the P-channel driver for the corresponding pin on
port E or port F. Clearing the bit to 0 enables the P-channel driver for the pin. Although the P-
channel drivers are always connected, the output driver type will be CMOS when the bit is cleared
to 0 and N-channel open-drain when it is set to 1.
PENOCR and PFNOCR are initialized to H'00 by a reset and in hardware standby mode. They
retain their prior states in software standby mode.
DDR
NOCR
ODR
N-ch. driver
P-ch. driver
MOS Input Pul-Up
0
—
0
1
OFF
OFF
OFF
ON
0
0
ON
OFF
1
1
OFF
ON
OFF
1
0
1
ON
OFF
OFF
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