REJ03F0258-0100
Rev. 1.00
Jan.08.2008
R8A66151SP
24-BIT I/O EXPANDER
DESCRIPTION
R8A66151 is a semiconductor integrated circuit which has 24-bit shift register function to execute serial in parallel out conversion and parallel in - serial out conversion.
Built in two shift registers for serial in - parallel out and parallel in - serial out are constructed independently,
This IC is able to read serial input data into a shift register while output the serial data converting from the
parallel data input.
Also, parallel data I/O pins can be set to input mode or output mode by a bit.
R8A66151 is useful in a wide range of applications, such as MCU (micro controller unit) I/O port extension
and serial bus system data communication. R8A66151 is the succession product of M66010.
FEATURES
Bi-directional serial communication with MCU
Serial data can be input during parallel to serial data conversion
Parallel data I/O pins can be set input mode or output mode by a bit
Schmitt input (DI, CLK, /S, /CS)
N-ch open drain output (DO, D1~D24)
Parallel data I/O pins (D1~D24)
Wide supply voltage range (Vcc=2.0 to 6.0V)
Wide operating temperature range (Ta=-40 to 85oC)
APPLICATION
Serial - parallel or parallel - serial data conversion for MCU peripheral.
Serial bus control by MCU.
PIN CONFIGURATION (TOP VIEW)
SERIAL DATA OUTPUT
DO
1
32
D1
SERIAL DATA INPUT
DI
2
31
D2
CLOCK INPUT CLK
3
30
D3
CS
4
29
D4
Vcc
5
28
D5
S
6
27
D6
GND
7
26
D7
D24
8
25
D8
CHIP SELECT INPUT
SET INPUT
D23
24
D9
D22
23
D10
D21
11
22
D11
D20
12
21
D12
D19
13
20
D13
D18
14
19
D14
D17
15
18
D15
GND
PARALLEL DATA
I/O
9
10
16
17
D16
REJ03F0258-0100 Rev.1.00 Jan.08.2008
Page 1 of 7
PARALLEL DATA
I/O
