MB88141 Fujitsu Media Devices, MB88141 Datasheet - Page 8

• Manufacturer Part Number: MB88141
• Description: A/D Converter
• Manufacturer: Fujitsu Media Devices

8
MB88141
2. For D/A Converter
(1) I
(2) Slave Address Comparison (7 bits)
(3) R/W Selection (1 bit)
Slave address comparison is the same as for D/A converter (12-channel) operation (see “1. (2) “Slave Address
Comparison”), with the exception that the CS2 setting determines the number of D/A converter channels and
the number of I/O expander bits.
When CS2 = “1” is selected, the upper 4 bits (D
ignored, and the upper 4 bits or read operations (parallel interface to I
2
First
First
C Bus Format
S: “Start” condition
S
S
: Sent from master device
Slave address (7 bits)
Slave address (7 bits)
S6
CS2
R/W
S6
0
1
0
1
S0 R/W
S0
I/O Expander Operation (MOD
P: “Stop” condition
R/W
Parallel data input
I
2
1
0
C bus input
A
4 channels (AO1 to AO4)
8 channels (AO1 to AO8)
I/O expander operation
A
Channel selection (8 bits)
D/A converter
D7
C7
Digital data (8 bits)
: Sent from MB88141 (slave device)
parallel data output
I
A: “Acknowledge” output
7
2
C bus output
to D
D0
C0
4
) of write operations (I
A
A
“H”)
Last
P
D7
Digital data (8 bits)
2
C bus) are output at “0” (low).
I
2
C bus input
D/A converter operation
2
C bus to parallel interface) are
8 bits (D7 to D0)
4 bits (D3 to D0)
D0
I/O expander
A
analog output
Last
P