參數(shù)資料
型號: SM5L3
廠商: SHARP ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PQFP80
封裝: 14 X 20 MM, PLASTIC, QFP-80
文件頁數(shù): 3/27頁
文件大?。?/td> 164K
代理商: SM5L3
4-Bit Single Chip Microcomputers
SM5L1/SM5L2/SM5L3
Microcomputer Data Sheet
11
Program Counter PC and
Stack Register SR
A ROM address is specified by the program counter
(PC). The PC is comprised of 12 bits where 6-bits (PU)
are used to specify the page, and 6-bit are used to
specify the step. PU is a register and PL is a binary
counter. The program counter PC and the Stack Reg-
ister SR are shown in Figure 15.
The table reference instruction PAT executes a sim-
ilar operation to that of the subroutine jump and uses
one level of the stack register.
Program Memory (ROM)
The ROM is used for program storage. The ROM
capacity of the SM5Lx is 2,048/3,072/4,096-step. The
ROM is organized into 32/48/64-page where one page
is organized into 64 steps.
Figure 14. Relationship between the Display RAM and LCD Segment Outputs/Common Outputs
BM = 1000
BL = 0000
BM = 1001
BL = 0000
BM = 1000
BL = 0001
SM5L1
SM5L2
SM5L3
SM5L1 SM5L2 SM5L3
BM = 1011
BM REGISTER
BM = 1000
LCD
DRIVE CIRCUIT
COMMON OUTPUTS
BL = 0011
BM = 1010
BL = 0100
BM = 1011
BL = 0100
BM = 1001
BL = 1111
BM = 1010
BL = 0000
BM = 1011
BL = 0000
BM = 1000
BL = 1001
BM = 1001
BL = 1001
BM = 1000
BL = 1010
H3
H2
H1
H0
M3
M2
M1
M0
S0
S1
S2
S18
S19
S30
S39
S40
S41
S31
S32
S33
(RAM BIT)
(REGISTER)
SEGMENT
5L1-14
.
Figure 15. Program Counter PC and Stack Register SR
PU
PL
5L1-15
SR (LEVEL 1)
PROGRAM COUNTER PC
STACK REGISTER SR
PAGE
MSB
PUSH
POP
LSB
STEP
SR (LEVEL 2)
SR (LEVEL 3)
SR (LEVEL 4)
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