KS57C2308/P2308/C2316/P2316
SAM47 INSTRUCTION SET
5-85
SRB
— Select Register Bank
SRB
n
Operation:
Operand
Operation Summary
Bytes
Cycles
n
Select register bank
2
2
Description:
The SRB instruction selects one of four register banks in the working register memory area. The
constant value used with SRB is 0, 1, 2, or 3. The following table shows the effect of SRB
settings:
ERB Setting
SRB Settings
Selected Register Bank
3
2
1
0
0
0
0
x
x
Always set to bank 0
0
0
Bank 0
1
0
0
0
1
Bank 1
1
0
Bank 2
1
1
Bank 3
NOTE
: “x” = not applicable.
The enable register bank flag (ERB) must always be set for the SRB instruction to execute
successfully for register banks 0, 1, 2, and 3. In addition, if the ERB value is logic zero, register
bank 0 is always selected, regardless of the SRB value.
Operand
Binary Code
Operation Notation
n
1
1
0
1
1
1
0
1
SRB
←
n (n = 0, 1, 2, 3)
0
1
0
1
0
0
d1
d0
Example:
If the ERB flag is set, the instruction
SRB
3
selects register bank 3 (018H–01FH) as the working memory register bank.
Summary of Contents for KS57C2308
Page 30: ...ADDRESS SPACES KS57C2308 P2308 C2316 P2316 2 22 NOTES ...
Page 168: ...SAM47 INSTRUCTION SET KS57C2308 P2308 C2316 P2316 5 94 NOTES ...
Page 170: ......
Page 206: ...POWER DOWN KS57C2308 P2308 C2316 P2316 8 8 NOTES ...
Page 210: ...RESET KS57C2308 P2308 C2316 P2316 9 4 NOTES ...
Page 222: ...I O PORTS KS57C2308 P2308 C2316 P2316 10 12 NOTES ...
Page 272: ...LCD CONTROLLER DRIVER KS57C2308 P2308 C2316 P2316 12 24 NOTES ...
Page 280: ...SERIAL I O INTERFACE KS57C2308 P2308 C2316 P2316 13 8 NOTES ...
Page 294: ...MECHANICAL DATA KS57C2308 P2308 C2316 P2316 15 2 NOTES ...
Page 310: ...KS57P2308 P2316 OTP KS57C2308 P2308 C2316 P2316 16 16 NOTES ...
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