r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 596
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r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
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Section 10 I/O Ports
10.7.4
P8ODR specifies the output type of each port 8 pin.
10.7.5
Port 8 pins also function as SCI I/Os, interrupt inputs, EXDMAC I/Os, PPG outputs, TPU I/Os,
and 8-bit timer I/Os. The correspondence between the register specification and the pin functions
is shown below.
(1)
• P85/EDACK3/IRQ5-B/SCK3/PO5-B/TIOCB4-B/TMO1-B
Rev. 1.00 Sep. 19, 2008 Page 566 of 1342
REJ09B0467-0100
Bit
7, 6
5
4
3
2
1
0
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, TPU channel 4 settings (by bits MD3 to MD0 in TMDR_4, bits IOB3 to
IOB0 in TIOR_4, and bits CCLR1 and CCLR0 in TCR_4), bits OS3 to OS0 in TCSR_1 of the
8-bit timer, bit NDER5 in NDERL of PPG, bit AMS in EDMDR_3 of EXDMAC, bit C/A in
SMR_3 and bits CKE0 and CKE1 in SCR_3 of SCI, bits PPGS, TPUS, and TMRS in PFCR3,
bit P85DDR, and bit ITS5 in ITSR of the interrupt controller.
Pin Functions of H8S/2456 Group and H8S/2456R Group
Bit Name
P85ODR
P84ODR
P83ODR
P82ODR
P81ODR
P80ODR
Port 8 Open Drain Control Register (P8ODR)
Pin Functions
Initial Value
All 0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 0. Only the initial
values should be written to these bits.
Setting a P8ODR bit to 1 makes the corresponding
pin an NMOS open-drain output pin, while clearing
a P8ODR bit to 0 makes the corresponding pin a
CMOS output pin.
Bits 4, 2, and 0 are reserved in the H8S/2454
Group.
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