h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 289
h8s-2635
Manufacturer Part Number
h8s-2635
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2635.pdf
(1547 pages)
- Current page: 289 of 1547
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Port 1 Register (PORT1)
Note: * Determined by state of pins P17 to P10.
PORT1 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 1 pins (P17 to P10) must always be performed on P1DR.
If a port 1 read is performed while P1DDR bits are set to 1, the P1DR values are read. If a port 1
read is performed while P1DDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORT1 contents are determined by the pin states, as
P1DDR and P1DR are initialized. PORT1 retains its prior state in software standby mode.
9.2.3
Port 1 pins also function as PPG output pins (PO15 to PO8), TPU I/O pins (TCLKA, TCLKB,
TCLKC, TCLKD, TIOCA0, TIOCB0, TIOCC0, TIOCD0, TIOCA1, TIOCB1, TIOCA2, and
TIOCB2), external interrupt input pins (
A20). Port 1 pin functions are shown in table 9-3.
Note: The PPG output is not implemented in the H8S/2635 Group.
Bit
Initial value :
R/W
Pin Functions
:
:
P17
— *
R
7
P16
— *
R
6
P15
I R Q 0
— *
R
5
and
P14
I R Q 1
— *
R
4
Rev. 6.00 Feb 22, 2005 page 229 of 1484
) , and address bus output pins (A23 to
P13
— *
R
3
P12
— *
R
2
Section 9 I/O Ports
REJ09B0103-0600
P11
— *
R
1
P10
— *
R
0
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