UPD6125AG NEC, UPD6125AG Datasheet - Page 14

• Manufacturer Part Number: UPD6125AG
• Description: 4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC

13. CONTROL REGISTER (P
14
Set
Value
Name
The control register contains of 10 bits. The controllable items are shown in Table 13-1.
Remark D
D
D
D
D
D
D
D
D
Bit
0 ..........................
1 ..........................
2 ..........................
3 ..........................
4
6 ..........................
7 ..........................
8
, D
, D
0
1
5 .................
9 .................
D
0
9
Test mode
= D
Be sure to reset to 0.
Specifies data to be input to A
Specifies the status of K
Specifies the status of the timer, as follows:
Specifies the carrier frequency output from the REM pin.
Specify the high-order 2 bits of the ROM data pointer.
Determines what happen to the oscillation circuit when the HALT instruction is executed.
Be sure to reset this bit to 0.
These bits specify test modes. Be sure to reset them to 0.
0: A
0: input mode, 1: output mode
0: Count stop, 1: Count execution
0: f
0: Oscillation does not stop
1: Oscillation stops (STOP mode)
8
= D
OSC
3
D
, 1: S-IN
9
/8, 1: f
8
= 0 on reset, and the other bits are undefined.
OSC
1
D
)
–
/12
7
Table 13-1. Control Register (P1)
I/O
STOP
, as follows:
HALT
NOP
OSC
D
6
0
when the accumulator is shifted to the left.
AD =0
AD =1
D.P.
AD
D
9
9
5
9
AD =0
AD =1
D.P.
AD
D
8
8
4
8
f
f
MOD
OSC
OSC
D
/12
3
/8
STOP
Timer
RUN
D
2
PD6125A, 6126A
OUT
K
D
IN
I/O
1
RL A
S-IN
A
D
A
0
0
3
CC