S3C84BB Datasheet, PDF (105/361 Pages) Samsung semiconductor – 8-BIT CMOS

S3C84BB/F84BB
CONTROL REGISTERS
SPH — Stack Pointer (High Byte)
D8H
Set 1
Bit Identifier
RESET Value
Read/Write
Addressing Mode
.7
.6
.5
.4
.3
.2
.1
.0
x
x
x
x
x
x
x
x
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register addressing mode only
.7–.0
Stack Pointer Address (High Byte)
The high-byte stack pointer value is the upper eight bits of the 16-bit stack pointer
address (SP15–SP8). The lower byte of the stack pointer value is located in register
SPL (D9H). The SP value is undefined following a reset.
SPL — Stack Pointer (Low Byte)
D9H
Set 1
Bit Identifier
RESET Value
Read/Write
Addressing Mode
.7
.6
.5
.4
.3
.2
.1
.0
x
x
x
x
x
x
x
x
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register addressing mode only
.7–.0
Stack Pointer Address (Low Byte)
The low-byte stack pointer value is the lower eight bits of the 16-bit stack pointer
address (SP7–SP0). The upper byte of the stack pointer value is located in register
SPH (D8H). The SP value is undefined following a reset.
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