參數(shù)資料
型號(hào): MB89T637R
廠商: Fujitsu Limited
英文描述: Scan Path Linkers With 4-Bit Identification Buses 28-CDIP -55 to 125
中文描述: 8位微控制器專有
文件頁(yè)數(shù): 22/59頁(yè)
文件大小: 864K
代理商: MB89T637R
MB89630R Series
22
2. Registers
The F
2
MC-8L family has two types of registers; dedicated registers in the CPU and general-purpose registers
in the memory. The following dedicated registers are provided:
Program counter (PC):
A 16-bit register for indicating the instruction storage positions
Accumulator (A):
A 16-bit temporary register for storing arithmetic operations, etc. When the
instruction is an 8-bit data processing instruction, the lower byte is used.
Temporary accumulator (T): A16-bit register which performs arithmetic operations with the accumulator
When the instruction is an 8-bit data processing instruction, the lower byte is used.
Index register (IX):
A16-bit register for index modification
Extra pointer (EP):
A16-bit pointer for indicating a memory address
Stack pointer (SP):
A16-bit register for indicating a stack area
Program status (PS):
A16-bit register for storing a register pointer, a condition code
The PS can further be divided into higher 8 bits for use as a register bank pointer (RP) and the lower 8 bits for
use as a condition code register (CCR). (See the diagram below.)
PC
A
T
IX
EP
SP
PS
16 bits
: Program counter
: Accumulator
: Temporary accumulator
: Index register
: Extra pointer
: Stack pointer
: Program status
FFFD
H
I-flag = 0, IL1, IL0 = 11
The other bit values are indeterminate.
Initial value
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Structure of the program status register
VacancyVacancyVacancy
H
I
IL1, IL0
N
Z
V
C
5
4
RP
PS
10
9
8
7
6
3
2
1
0
15
14
13
12
11
RP
CCR
相關(guān)PDF資料
PDF描述
MB89T637RPF Scan Path Linkers With 4-Bit Identification Buses 28-LCCC -55 to 125
MB89635R Quadruple 2-Input Exclusive-OR Gates 14-CDIP -55 to 125
MB89635RP-SH Quadruple 2-Input Exclusive-OR Gates 14-CFP -55 to 125
MB89635RPF Quadruple 2-Input Exclusive-OR Gates 20-LCCC -55 to 125
MB89635RPFM Quadruple 2-Input Exclusive-OR Gates 14-CDIP -55 to 125
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