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參數(shù)資料
| 型號： | UPD6600A |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| 中文描述： | 4位單片機(jī)的遙控傳輸 |
| 文件頁數(shù)： | 5/36頁 |
| 文件大小： | 172K |
| 代理商： | UPD6600A |
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μ
PD6124A, 6600A
5
3.
PROGRAM MEMORY (ROM) ……… 512 STEPS
×
10 BITS
:
μ
PD6600A
1002 STEPS
×
10 BITS :
μ
PD6124A
The program memory (ROM) is configured in 10 bits steps. It is addressed by the program counter.
Program and table data are stored in the program memory.
Figure 3-1. Program Memory Map
000H
0FFH
100H
1FFH
Test program
area
PD6124A
μ
(b)
PD6600A
μ
(a)
000H
0FFH
100H
1FFH
200H
2FFH
300H
3E9H
3EAH
3FFH
4.
DATA MEMORY (RAM) ……… 32 WORDS
×
5 BITS
The data memory is a RAM of 32 words
×
5 bits. The data memory stores processing data. In some cases, the
data memory is processed in 8-bit units. R
0
may be used as the data pointer for the ROM.
After power application, the RAM will be undefined. The RAM retains the previous data on reset.
Figure 4-1. Data Memory Organization
1
R
0
0
R
F
R
B
R
C
SP–3
SP–2
SP–1
SP–0
.
.
Caution
Avoid using the RAM areas R
D
, R
E
, and R
F
in a CALL routine as much as possible because these areas
are also used as stack memory areas (to prevent program hang-up in case the value of the SP is
destroyed due to some reason such as noise).
When using these RAM areas as general-purpose RAM areas, be sure to include stack pointer
checking in the main routine.
0
0
1
1
0
0
1
1
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