參數(shù)資料
型號: S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 106/161頁
文件大小: 1037K
代理商: S1C621A0F0A0100
I-24
EPSON
S1C621A0 TECHNICAL HARDWARE
CHAPTER 3: PERIPHERAL CIRCUITS (I/O Ports)
3.6 I/O Ports (P00–P03)
The S1C621A0 has a single 4-bit general-purpose I/O port.
As shown in Figure 3.6.1, the Pnm pin works as an output
port and it goes high or low levels when the value of the
control register (IOC) is 1. The Pnm pin works as an input
port and it goes to high-impedance state when the value of
the control register is 0. (in this case, however, the Pnm pin
is pulled up during and input operation under program
control.)
At initial reset, the control register is set to 0 and the I/O
port works as input.
Table 3.6.1 shows data assignment to the I/O port bits and
the I/O control register on the memory map.
Fig. 3.6.1
I/O Port Configuration
VDD
P
Register
nm
Input
control
Control
register
Data
bus
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