PD62A_15 Datasheet, PDF (16/64 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION

µPD62A
3. PORT REGISTERS (PX)
The KI/O port, the KI port, the special ports (S0, S1/LED), and the control registers are treated as port registers.
The port register values after reset are shown below.
Figure 3-1. Port Register Configuration
KI/O7
KI3
0
0
Port Register
After Reset
P0
FFH
P10
P00
KI/O6
KI/O5
KI/O4
KI/O3
P1
KI/O2
KI/O1
KI/O0
× FH^Note
P11
P01
KI2
KI1
KI0
S1/LED
S0
1
1
P3 (Control register 0)
03H
P13
P03
0
DP9
DP8
TCTL
CARY
MOD1
MOD0
P4 (Control register 1)
26H
P14
0
KI
S0/S1
pull-down pull-down
P04
0
S1/LED mode KI/O mode S0 mode
Note ×: Refers to the value based on the KI pin status.
Table 3-1. Relationship Between Ports and Read/Write
Port Name
KI/O
KI
S0
S1/LED
Input Mode
Read
Write
Pin status
Output latch
Pin status
—
Pin status
—
Pin status
—
Output Mode
Read
Write
Output latch Output latch
—
—
Note
—
Pin status
—
Note When in OFF mode, “1” is normally read.
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Data Sheet U14474EJ2V0DS00