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參數(shù)資料
| 型號(hào)： | UPD64 |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION |
| 中文描述： | 4位單片機(jī)的紅外遙控傳輸 |
| 文件頁(yè)數(shù)： | 10/68頁(yè) |
| 文件大?。?/td> | 301K |
| 代理商： | UPD64 |
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10
μ
PD63, 63A, 64
2.4 Program Memory (ROM): 512 steps
×
10 bits (
μ
PD63)
768 steps
×
10 bits (
μ
PD63A)
1002 steps
×
10 bits (
μ
PD64)
The ROM consists of 10 bits per step, and is addressed by the program counter.
The program memory stores programs and table data, etc.
The 22 steps from 3EAH to 3FFH cannot be used in the test program area.
Figure 2-3. Program Memory Map
(a)
μ
PD63
(b)
μ
PD63A
(c)
μ
PD64
000H
0FFH
100H
1FFH
200H
000H
0FFH
100H
1FFH
200H
2FFH
300H
3EAH
3FFH
3E9H
10 bits
Unmounted area
Note
3EAH
3FFH
Test program area
Note
10 bits
000H
0FFH
100H
1FFH
200H
10 bits
Unmounted area
Note
3EAH
3FFH
Test program area
Note
3E9H
2FFH
300H
3E9H
Test program area
Note
Note
The unmounted area and the test program area are so designed that a program or data placed in either
of them by mistake is returned to the 000H address.
2.5 Data Memory (RAM): 32
×
4 Bits
The data memory, which is a static RAM consisting of 32
×
4 bits, is used to retain processed data. The data
memory is sometimes processed in 8-bit units. R0 can be used as the ROM data pointer.
RF is also used as the ASR.
When reset, R0 is cleared to “00H” and R1 to RF retain the previous data (undefined when turning on the power).
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