upd6133 Renesas Electronics Corporation., upd6133 Datasheet - Page 14

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upd6133

Manufacturer Part Number
upd6133
Description
4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
Manufacturer
Renesas Electronics Corporation.
Datasheet

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3. PORT REGISTERS (PX)
14
The K
At reset, port register values are shown below.
Note
I/O
K
K
port, the K
I/O7
0
0
: Refers to the value based on the K
I3
K
Note When in OFF mode, “1” is normally read.
K
0
0
I/O6
K
K
S
S
I2
I
Port Name
I/O
I
0
1
port, the special ports (S
/LED
Table 3-1. Relationship between Ports and their Read/Write
P
P
P
P
10
11
13
14
pull-down
K
DP
K
K
I/O5
I1
I
9
Figure 3-1. Port Register Organization
Pin state
Pin state
Pin state
Pin state
P3 (Control register 0)
P4 (Control register 1)
pull-down
S
K
Read
DP
K
0
Port Register
I/O4
/S
I0
8
1
INPUT Mode
Data Sheet U10454EJ6V0DS00
P0
P1
S
0
TCTL
, S
K
1
I
/LED
I/O3
0
pin state.
Output latch
1
/LED), and the control register are treated as port registers.
Write
S
1
/LEDmode K
CARY
K
S
I/O2
0
P
P
P
P
Output latch
Note
Pin state
00
01
03
04
I/O
MOD
Read
K
mode
I/O1
1
OUTPUT Mode
1
S
MOD
0
K
mode
Output latch
I/O0
1
0
Write
FFH
03H
26H
FH
Note
At Reset
PD6133, 6134

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