参数资料
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: 17/73页
文件大小: 1272K
代理商: 7549
Rev.2.00
REJ03B0202-0200
Mar 05, 2007
Page 17 of 70
7549 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Fig 16. Block diagram of pins (1)
INT
0
input
Data bus
Port latch
Pull-up control bit
Direction
register
(1) Port P0
0
Drive capacity
control bit
Data bus
INT
1
input
(2) Port P0
1
(3) Port P0
2
(4) Port P0
3
CAP0 input
(5) Port P0
4
Serial I/O input
Receive enable bit
Serial I/O enable bit
(6) Port P0
5
Transmit enable bit
P0
5
/T
X
D P-channel output disable bit
Serial I/O enable bit
(7) Port P0
6
Serial I/O synchronous
clock selection bit
Serial I/O mode selection bit
Serial I/O enable bit
Serial I/O enable bit
Serial I/O clock output
(8) Port P0
7
S
RDY
output enable bit
Serial I/O ready output
represents a parasitic diode.
No current flow is possible. Ensure that the input voltage
to each pin does not exceed the absolute maximum rating.
Note:
Port latch
Direction
register
Pull-up control bit
Drive capacity
control bit
Pull-up control bit
Direction
register
Data bus
Port latch
Drive capacity
control bit
Pull-up control bit
Data bus
Direction
register
Port latch
Drive capacity
control bit
Pull-up
control bit
Direction
register
Port latch
Data bus
Drive capacity
control bit
Data bus
Pull-up control bit
Direction
register
Port latch
Drive capacity
control bit
Pull-up control bit
Direction
register
Port latch
Data bus
Drive capacity
control bit
Pull-up control bit
Direction
register
Port latch
Data bus
Drive capacity
control bit
Serial I/O output
Serial I/O clock input
Serial I/O mode selection bit
Serial I/O enable bit
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