参数资料
型号: SDA20C440
厂商: SIEMENS A G
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PQFP80
封装: PLASTIC, MQFP-80
文件页数: 55/55页
文件大小: 990K
代理商: SDA20C440
SDA 20C440
Semiconductor Group
9
1.3
Pin Definitions and Functions
Pin
No.
Symbol
Input (I)
Output (O)
Supply (S)
Function
61
62
63
64
65
66
67
68
P0.0/INT
P0.1
P0.2
P0.3
P0.5
P0.6
P0.7
I/O
Port 0 is an 8-bit bidirectional I/O-port,
comprising one line for external interrupt.
74
75
76
77
P1.0/AD0
P1.1/AD1
P1.2/AD2
P1.3/AD3
I
Port 1 is a 4-bit input port, comprising four
analog inputs for A/D-conversion.
69
70
P2.0/RXD
P2.1/TXD
I/O
Port 2 is a 2-bit bidirectional I/O-port,
comprising the receive and transmit line for the
serial interface.
71
72
XTAL1
XTAL2
I
O
Input of the inverting oscillator amplifier. To
drive the device from an external clock source,
XTAL1 should be driven while XTAL2 is left
open.
Output of the inverting oscillator amplifier. Only
supported, if an external quartz oscillator is
used.
71
72
RC1
RC2
I
O
Input to a Schmitt trigger inverter for RC-type
oscillator (optional)
Output of the Schmitt trigger inverter (optional)
73
RESET
I
A low level on this pin for at least 4
s while the
oscillator is running resets the processor.
80
1, 60
VDD
VSS
S
Power supply voltage
Ground (0 V)
79
78
VAGND
VAREF
S
ADC-low reference voltage
ADC-high reference voltage
21,40
VLCIN
S
LCD-reference voltage inputs
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