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| 型号： | 7549 |
| 厂商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 6/73页 |
| 文件大小： | 1272K |
| 代理商： | 7549 |
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Rev.2.00
REJ03B0202-0200
Mar 05, 2007
Page 6 of 70
7549 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
PIN DESCRIPTION
Table 2
NOTE:
1. The oscillation circuit is built in the P2
0
/X
OUT
/X
COUT
pin and the P2
1
/X
IN
/X
CIN
pin. When the Vcc of the microcomputer is lower than
the operation lower bound voltage even if these pins are used as I/O ports, the oscillation circuit is connected and undefined values
may be output from these pins.
Pin description
Pin
Name
Function
Function expect a port function
V
CC
,V
SS
CNV
SS
Power source
CNV
SS
Reset input
I/O port P0
Apply voltage of 1.8 to 5.5 V to Vcc, and 0 V to Vss.
Controls the operation mode of the chip. Connected to V
SS
.
Reset input pin for active “L”
RESET
P0
0
(LED0)/INT
0
P0
1
(LED1)/INT
1
P0
2
(LED2)
P0
3
(LED3)/CAP
0
P0
4
(LED4)/R
X
D
P0
5
(LED5)/T
X
D
P0
6
(LED6)/S
CLK
P0
7
(LED7)/S
RDY
8-bit I/O port.
I/O direction register allows each pin to be individu-
ally programmed as either input or output.
CMOS compatible input level
CMOS 3-state output structure
Whether a built-in pull-up resistor is to be used or not
can be determined by program.
High drive capacity for LED drive port can be
selected by program.
Interrupt input pin
Capture input pin
Serial interface function pin
P1
0
/AN
0
/KEY
0
/CMP
0
P1
1
/AN
1
/KEY
1
/CMP
1
P1
2
/AN
2
/KEY
2
/CMP
2
P1
3
/AN
3
/KEY
3
/T2
OUT
I/O port P1
8-bit I/O port.
I/O direction register allows each pin to be individu-
ally programmed as either input or output.
CMOS compatible input level
CMOS 3-state output structure
Whether a built-in pull-up resistor is to be used or not
can be determined by program.
Input pins
for A/D
converter
Key-input
(key-on
wake up
interrupt
input) pin
Compare
output
pin
Timer 2
output
pin
P1
4
/AN
4
/KEY
4
P1
5
/AN
5
/KEY
5
P1
6
/AN
6
/KEY
6
P1
7
/AN
7
/KEY
7
P2
0
/X
OUT
/X
COUT
P2
1
/X
IN
/X
CIN
(Note)
I/O port P2
2-bit I/O port. (P2
0
/X
OUT
/X
COUT
is only for output)
I/O direction register allows each pin to be individu-
ally programmed as either input or output.
CMOS compatible input level
CMOS 3-state output structure
Function set ROM allows pins to be used as clock
pins.
Pins X
IN
and X
OUT
, or pins X
CIN
and X
COUT
, can be used as clock
pins by connecting a ceramic
resonator, crystal oscillator, or 32
kHz crystal oscillator between
them. Alternately, an external
clock may be input to the
P2
0
/X
OUT
/X
COUT
pin. In this case,
the P2
1
/X
IN
/X
CIN
pin can be used
as an I/O port.
P3
0
, P3
1
I/O port P3
2-bit I/O port.
I/O direction register allows each pin to be individually programmed as either input or
output.
CMOS compatible input level
CMOS 3-state output structure
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相关代理商/技术参数 |
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|---|---|
| 7549_0710 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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