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EM78156EAS 参数 Datasheet PDF下载

EM78156EAS图片预览
型号: EM78156EAS
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器与MASK ROM [8-Bit Microcontroller with MASK ROM]
分类和应用: 微控制器光电二极管局域网有原始数据的样本ROM
文件页数/大小: 48 页 / 420 K
品牌: ELAN [ ELAN MICROELECTRONICS CORP ]
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EM78156E  
8-Bit Microcontroller with MASK ROM  
Only the lower 4 bits of IOC5 can be defined.  
IOC5 and IOC6 registers are both readable and writable.  
4.2.4 IOCA (Prescaler Counter Register)  
IOCA register is readable.  
The value of IOCA is equal to the contents of Prescaler counter.  
Down counter.  
4.2.5 IOCB (Pull-down Control Register)  
7
6
5
4
3
2
1
0
/PD7  
/PD6  
/PD5  
/PD4  
-
/PD2  
/PD1  
/PD0  
Bit 0 (/PD0) Control bit is used to enable the pull-down of P50 pin.  
0: Enable internal pull-down  
1: Disable internal pull-down  
Bit 1 (/PD1) Control bit is used to enable the pull-down of P51 pin.  
Bit 2 (/PD2) Control bit is used to enable the pull-down of P52 pin.  
Bit 3  
Not used.  
Bit 4 (/PD4) Control bit is used to enable the pull-down of P60 pin.  
Bit 5 (/PD5) Control bit is used to enable the pull-down of P61 pin.  
Bit 6 (/PD6) Control bit is used to enable the pull-down of P62 pin.  
Bit 7 (/PD7) Control bit is used to enable the pull-down of P63 pin.  
IOCB Register is both readable and writable.  
4.2.6 IOCC (Open-drain Control Register)  
7
6
5
4
3
2
1
0
OD7  
OD6  
OD5  
OD4  
OD3  
OD2  
OD1  
OD0  
Bit 0 (OD0) Control bit used to enable the open-drain of P60 pin.  
0: Disable open-drain output  
1: Enable open-drain output  
Bit 1 (OD1) Control bit is used to enable the open-drain of P61 pin.  
Bit 2 (OD2) Control bit is used to enable the open-drain of P62 pin.  
Bit 3 (OD3) Control bit is used to enable the open-drain of P63 pin.  
Bit 4 (OD4) Control bit is used to enable the open-drain of P64 pin.  
Bit 5 (OD5) Control bit is used to enable the open-drain of P65 pin.  
Product Specification (V1.3) 07.29.2004  
9  
(This specification is subject to change without further notice)  
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