W741E20X Datasheet, PDF (74/84 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

Preliminary W741E20X
Instruction Set Table 2, continued
SHRC R
SHift Right R with CF and MSB = 0
Machine Code:
Machine Cycle:
Operation:
Description:
Flag Affected:
SKB0 R
01001101
0 R6 R5 R4 R3 R2 R1 R0
1
ACC.n, R.n ← (R.n+1); ACC.3, R.3 ← 0; CF ← R.0
The contents of the ACC and the data memory location addressed by R6 to
R0 are shifted right one bit, but bit 0 is shifted into CF, and bit 3 (MSB) is
replaced with "0." The same contents are loaded into the ACC.
CF & ZF
If bit 0 of R is equal to 1 then skip
Machine Code:
Machine Cycle:
Operation:
Description:
SKB1 R
10001000
0 R6 R5 R4 R3 R2 R1 R0
1
PC ← (PC) + 2; if R.0 = 1“1”
If bit 0 of R is equal to 1, the program counter is incremented by 2 and a
skip is produced. If bit 0 of R is not equal to 1, the program counter (PC) is
incremented.
If bit 1 of R is equal to 1 then skip
Machine Code:
Machine Cycle:
Operation:
Description:
10001000
1 R6 R5 R4 R3 R2 R1 R0
1
PC ← (PC) + 2; if R.1 = 1“1”
If bit 1 of R is equal to 1, the program counter is incremented by 2 and a
skip is produced. If bit 1 of R is not equal to 1, the program counter (PC) is
incremented.
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