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| 型号： | M38203E4-XXXHP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 0.50 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 11/69页 |
| 文件大小： | 944K |
| 代理商： | M38203E4-XXXHP |
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Rev.4.01
Nov 14, 2003
page 19 of 136
3803/3804 Group
I/O PORTS
The I/O ports have direction registers which determine the input/
output direction of each individual pin. Each bit in a direction reg-
ister corresponds to one pin, and each pin can be set to be input
port or output port.
When “0” is written to the bit corresponding to a pin, that pin be-
P00/AN8–P07/AN15
P10/INT41
P11/INT01
P12–P17
P20/LED0–
P27/LED7
P30/DA1
P31/DA2
P32
P33
P34/RxD3
P35/TxD3
P36/SCLK3
P37/SRDY3
P40/INT40/XCIN
P41/INT00/XCOUT
P42/INT1
P43/INT2
P44/RxD1
P45/TxD1
P46/SCLK1
P47/SRDY1/CNTR2
Pin
Name
I/O Structure
CMOS compatible input level
CMOS 3-state output
Non-Port Function
Ref.No.
Table 6 I/O port function of 3803 group
Related SFRs
Port P0
Port P1
Port P3
(1)
(2)
Port P2
A-D converter input
External interrupt input
D-A converter output
AD/DA control register
Interrupt edge selection
register
AD/DA control register
(3)
(4)
(5)
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
N-channel open-drain output
CMOS compatible input level
CMOS 3-state output
Port P4
Serial I/O3 function I/O
Serial I/O3 control
register
UART3 control register
(6)
(7)
(8)
(9)
External interrupt input
Sub-clock generating
circuit
External interrupt input
Serial I/O1 function I/O
Interrupt edge selection
register
CPU mode register
Interrupt edge selection
register
Serial I/O1 control
register
UART1 control register
(10)
(11)
(2)
(6)
(7)
(8)
(12)
Serial I/O1 function I/O
Timer Z function I/O
Serial I/O1 control
register
Timer Z mode register
Serial I/O2 control
register
Serial I/O2 function I/O
Port P5
Port P6
(13)
(14)
(15)
(16)
(17)
(18)
(2)
(1)
Timer X, Y function I/O
PWM output
External interrupt input
A-D converter input
Timer XY mode register
PWM control register
Interrupt edge selection
register
AD/DA control register
Notes 1: Refer to the applicable sections how to use double-function ports as function I/O ports.
2: Make sure that the input level at each pin is either 0 V or VCC during execution of the STP instruction.
When an input level is at an intermediate potential, a current will flow from VCC to VSS through the input-stage gate.
comes an input pin. When “1” is written to that bit, that pin be-
comes an output pin.
If data is read from a pin which is set to output, the value of the
port output latch is read, not the value of the pin itself. Pins set to
input are floating. If a pin set to input is written to, only the port
output latch is written to and the pin remains floating.
P50/SIN2
P51/SOUT2
P52/SCLK2
P53/SRDY2
P54/CNTR0
P55/CNTR1
P56/PWM
P57/INT3
P60/AN0–P67/AN7
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
CMOS 3-state output
CMOS compatible input level
CMOS 3-state output
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