參數(shù)資料
型號(hào)： M38039GCHKP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64
封裝： 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù)： 14/103頁(yè)
文件大?。?/td> 1412K
代理商： M38039GCHKP
REJ03B0166-0113 Rev.1.13
Aug 21, 2009
Page 18 of 100
3803 Group (Spec.H QzROM version)
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 register 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
becomes an input pin. When “1” is written to that bit, that pin
becomes 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.
By setting the port P0 pull-up control register (address 0FF016)
to the port P6 pull-up control register (address 0FF616) ports can
control pull-up with a program. However, the contents of these
registers do not affect ports programmed as the output ports.
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.
Table 6
I/O port function
Pin
Name
Input/
Output
I/O Structure
Non-Port Function
Related SFRs
Ref.
No.
P00/AN8
P07/AN15
Port P0 Input/output,
individual
bits
CMOS compatible
input level
CMOS 3-state
output
A/D converter input
AD/DA control register
(1)
P10/INT41
P11/INT01
Port P1
External interrupt input
Interrupt edge selection register
(2)
P12
P17
(3)
P20(LED0)
P27(LED7)
Port P2
P30/DA1
P31
/DA2
Port P3
D/A converter output
AD/DA control register
(4)
P32, P33
CMOS compatible
input level
N-channel
open-drain output
(5)
P34/RXD3
P35/TXD3
P36/SCLK3
P37/SRDY3
CMOS compatible
input level
CMOS 3-state
output
Serial I/O3 function I/O
Serial I/O3 control register
UART3 control register
(6)
(7)
(8)
(9)
P40/INT40
/XCOUT
P41/INT00
/XCIN
Port P4
External interrupt input
Sub-clock generating circuit
Interrupt edge selection register
CPU mode register
(10)
(11)
P42/INT1
P43/INT2
External interrupt input
Interrupt edge selection register
(2)
P44/RXD1
P45/TXD1
P46/SCLK1
Serial I/O1 function I/O
Serial I/O1 control register
UART1 control register
(6)
(7)
(8)
P47/SRDY1/CNTR2
Serial I/O1 function I/O
Timer Z function I/O
Serial I/O1 control register
Timer Z mode register
(12)
P50/SIN2
P51/SOUT2
P52/SCLK2
P53/SRDY2
Port P5
Serial I/O2 function I/O
Serial I/O2 control register
(13)
(14)
(15)
(16)
P54/CNTR0
P55/CNTR1
Timer X, Y function I/O
Timer XY mode register
(17)
P56/PWM
PWM output
PWM control register
(18)
P57/INT3
External interrupt input
Interrupt edge selection register
(2)
P60/AN0
P67/AN7
Port P6
A/D converter input
AD/DA control register
(1)
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