UPD17134A Datasheet, PDF (258/292 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLER

CHAPTER 19 INSTRUCTION SET
(10) POKE rf, WR
<1> OP code
10
87
43
0
Poke window register to register file
1
2
00111
rfR
0010
rfC
3
<2> Function
4
(rf) ← WR
5
Stores the window register WR contents to register file.
6
<3> Example
To store immediate data 0FH to P0DBIO for the register file through the window register:
7
MOV
WR, #0FH
POKE
P0DBIO, WR
; Sets all of P0D0, P0D1, P0D2, and P0D3 in output mode
8
9
Bank 0
Column address
0 1 2 3 4 5 6 7 8 9 ABCDE F
10
0
1
11
2
3
12
4
5
13
6
7
WR
System register
14
15
Column address
16
0 1 2 3 4 5 6 7 8 9 ABCDE F
0
17
1
2
18
3
Register file
P0DBIO
19
20
239