參數(shù)資料
型號(hào): GMS90L54
英文描述: 8-Bit CMOS Microcontroller(8位CMOS 微控制器)
中文描述: 8位CMOS微控制器(8位的CMOS微控制器)
文件頁(yè)數(shù): 13/59頁(yè)
文件大小: 812K
代理商: GMS90L54
CPU
The GMS90 series is efficient both as a controller and as an arithmetic processor. It has extensive facilities
for binary and BCD arithmetic and excels in its bit-handling capabilities. Efficient use of program memory
results from an instruction set consisting of 44% one-byte, 41% two-byte, and 15% three-byte instructions.
With a 12 MHz crystal, 58% of the instructions are executed in 1.0
§á
.
Special Function Register PSW
Reset value of PSW is 00H.
Bit
CY
Function
Carry Flag
AC
Auxiliary Carry Flag (for BCD operations)
F0
General Purpose Flag
RS1 RS0
0 0
0 1
1 0
1 1
Register Bank select control bits
Bank 0 selected, data address 00H - 07
H
Bank 1 selected, data address 08H - 0F
H
Bank 2 selected, data address 10H - 17
H
Bank 3 selected, data address 18H - 1F
H
OV
Overflow Flag
F1
General Purpose Flag
P
Parity Flag
Set/cleared by hardware each instruction cycle to indicate an odd/even number
of "one" bits in the accumulator, i.e. even parity.
CY
AC
F0
RS1
RS0
OV
F1
P
7
6
5
4
3
2
1
0
MSB
LSB
Addr. D0
H
Bit No.
PSW
8-Bit CMOS Microcontroller
GMS90 Series
MAY. 1998
13
LG Semicon MCU
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