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MEMORY MAP KS57C2308/P2308/C2316/P2316
4-24
PSW — Program Status Word FB1H, FB0H
Bit
7 6 5 4 3 2 1 0
Identifier C SC2 SC1 SC0 IS1 IS0 EMB ERB
RESET Value
(1) 0 0 0 0 0 0 0
Read/Write
R/W R R R R/W R/W R/W R/W
Bit Addressing
(2) 8 8 8 1/4/8 1/4/8 1/4/8 1/4/8
C Carry Flag
0 No overflow or borrow condition exists
1 An overflow or borrow condition does exist
SC2–SC0 Skip Condition Flags
0 No skip condition exists; no direct manipulation of these bits is allowed
1 A skip condition exists; no direct manipulation of these bits is allowed
IS1, IS0 Interrupt Status Flags
0 0 Service all interrupt requests
0 1 Service only the high-priority interrupt(s) as determined in the interrupt
priority register (IPR)
1 0 Do not service any more interrupt requests
1 1 Undefined
EMB Enable Data Memory Bank Flag
0 Restrict program access to data memory to bank 15 (F80H–FFFH) and to
the locations 000H–07FH in the bank 0 only
1 Enable full access to data memory banks 0, 1, 2, and 15
ERB Enable Register Bank Flag
0 Select register bank 0 as working register area
1 Select register banks 0, 1, 2, or 3 as working register area in accordance with
the select register bank (SRB) instruction operand
NOTES:
1. The value of the carry flag after a RESET occurs during normal operation is undefined. If a RESET occurs during
power-down mode (IDLE or STOP), the current value of the carry flag is retained.
2. The carry flag can only be addressed by a specific set of 1-bit manipulation instructions. See Section 2 for
detailed information.