MSP3411G Micronas, MSP3411G Datasheet - Page 19

• Manufacturer Part Number: MSP3411G
• Description: (MSP34x1G) Multistandard Sound Processor Family
• Manufacturer: Micronas

PRELIMINARY DATA SHEET
3.1.3. Protocol Description
Write to DSP or Demodulator
Read from DSP or Demodulator
Write to Control or Test Registers
Note: S =
Fig. 3–1: I
MICRONAS INTERMETALL
S
S
S
I2C_DA
I2C_CL
address
address
address
device
device
device
write
write
write
P =
ACK =
NAK =
Wait =
2
C bus protocol (MSB first; data must be stable while clock is high)
Wait ACK sub-addr ACK addr-byte
Wait ACK sub-addr ACK addr-byte
Wait ACK sub-addr ACK data-byte
I
I
Acknowledge-Bit: LOW on I2C_DA from slave (= MSP, light gray)
or master (= controller dark gray)
Not Acknowledge-Bit: HIGH on I2C_DA from master (dark gray) to indicate ‘End of Read’
or from MSP indicating internal error state
I
max. 1 ms
S
2
2
2
C-Bus Start Condition from master
C-Bus Stop Condition from master
C-Clock line is held low, while the MSP is processing the I
high
high
high
ACK addr-byte
ACK addr-byte
ACK data-byte
1
0
low
low
low
ACK data-byte-
ACK S
ACK P
high
address
device
read
ACK data-byte
2
Wait
C command. This waiting time is
P
low
ACK data-byte-
ACK P
high
MSP 34x1G
ACK data-byte
low
NAK P
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