參數(shù)資料
型號： UPD65858-QFP160P1.2SQ
英文描述： ASIC
中文描述： 專用集成電路
文件頁數(shù)： 10/64頁
文件大小： 399K
代理商： UPD65858-QFP160P1.2SQ
10
μ
PD64A, 65
Data Sheet U14380EJ2V0DS00
2.4 Program Memory (ROM): 1002 steps
×
10 bits (
μ
PD64A)
2026 steps
×
10 bits (
μ
PD65)
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 7EAH to 7FFH cannot be used in the test program area.
Figure 2-3. Program Memory Map
Note
The unmounted area and 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).
10 bits
Page 0
000H
3FFH
400H
7E9H
7EAH
7FFH
000H
3E9H
3EAH
7E9H
7EAH
7FFH
Unmounted area
Note
Test program area
Note
Test program area
Note
Page 0
Page 1
10 bits
(a) PD64A
(b) PD65
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