参数资料
型号: ZPSD402A2-C-15L
元件分类: 微控制器/微处理器
英文描述: 32K X 16 UVPROM, 40 I/O, PIA-GENERAL PURPOSE, CQCC68
封装: CERAMIC, LDCC-68
文件页数: 70/128页
文件大小: 433K
代理商: ZPSD402A2-C-15L
PSD4XX Family
42
PSD4XX Family
Table 7. 8-Bit Data Bus
Table 8. 16-Bit Data Bus With BHE
WRH
WRL
D15 – D8
D7 – D0
0
Odd byte
Even byte
0
1
Odd byte
1
0
Even byte
Table 9. 16-Bit Data Bus With WRH and WRL
SIZ0
A0
D15 – D8
D7 – D0
0
Even byte
Odd byte
1
0
Even byte
1
Odd byte
Table 10. 16-Bit Data Bus With SIZ0, A0
LDS
UDS
D15 – D8
D7 – D0
0
Even byte
Odd byte
1
0
Even byte
0
1
Odd byte
Table 11. 16-Bit Data Bus With UDS, LDS
9.2.4 Data Byte Enable
Microcontrollers have different data byte orientations with regard to the data bus. The
following tables show how the PSD4XX handles the byte enable under different bus
configurations. Even byte refers to locations with address A0 equal to “0”, and odd byte as
locations with A0 equal to “1”.
BHE
A0
D15 – D8
D7 – D0
0
Odd byte
Even byte
0
1
Odd byte
1
0
Even byte
BHE
A0
D7 – D0
X
0
Even Byte
X
1
Odd Byte
The PSD4XX
Architecture
(cont.)
相关PDF资料
PDF描述
ZPSD411A2V-C-20JI 32K X 8 OTPROM, 40 I/O, PIA-GENERAL PURPOSE, PQCC68
ZPSD413A1-C-15L 128K X 8 UVPROM, 40 I/O, PIA-GENERAL PURPOSE, CQCC68
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