TDA5251F1 Datasheet, PDF (25/88 Pages) Infineon Technologies AG – ASK/FSK 315MHz Wireless Transceiver

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Bus Data Format in I²C Mode
TDA5251 F1
Version 1.0
Functional Description
Table 2-7
MSB
1
1
Chip address Organization
110000
110000
LSB
0
1
Function
Chip Address Write
Chip Address Read
Table 2-8 I²C Bus Write Mode 8 Bit
MSB
STA 1
CHIP ADDRESS
(WRITE)
110000
LSB
MSB
0 ACK S7
SUB ADDRESS (WRITE) LSB
00H...08H, 0DH, 0EH, 0FH
MSB
DATA IN
LSB
S6 S5 S4 S3 S2 S1 S0 ACK D7 D6 D5 D4 D3 D2 D1 D0 ACK STO
Table 2-9 I²C Bus Write Mode 16 Bit
MSB CHIP ADDRESS (WRITE) LSB
MSB
SUB ADDRESS (WRITE)
00H...08H, 0DH, 0EH, 0FH
LSB
MSB
DATA IN LSB
STA 1 1 1 0 0 0 0 0 ACK S7 S6 S5 S4 S3 S2 S1 S0 ACK D15 ... D8 ACK D7 D6 ... D0 ACK STO
Table 2-10 I²C Bus Read Mode
MSB CHIP ADDRESS (WRITE) LSB
MSB
SUB ADDRESS (READ)
80H, 81H
LSB
MSB CHIP ADDRESS (READ)
STA 1 1 1 0 0 0 0 0 ACK S7 S6 S5 S4 S3 S2 S1 S0 ACK STA 1 1 1 0 0 0 0
Table 2-10 I²C Bus Read Mode (continued)
MSB
DATA OUT FROM SUB ADDRESS
LSB
R7
R6
R5
R4
R3
R2
R1
R0
ACK*
* mandatory HIGH
LSB
1 ACK
STO
3-wire Bus Mode
In this mode pin 2 (BusMode)= HIGH and Pin 16 (BusData) is in the data input/output pin. Pin 24
(EN) is used to activate the bus interface to allow the transfer of data to / from the device. When pin
24 (EN) is inactive (HIGH), data transfer is inhibited.
Data Transition:
Data transition on pin 16 (BusData) can only occur if the clock BusCLK is LOW. To perform a data
transfer the interface has to be enabled. This is done by setting the EN line to LOW. A serial transfer
is done via BusData, BusCLK and EN. The bit stream needs no chip address.
Data Transfer Write Mode:
To start the communication the EN line has to be set to LOW. The desired sub address byte and
data bytes have to follow. The subaddress (00H...0FH) determines which of the data bytes are
transmitted. At the end of data transition the EN must be HIGH.
Data transfer Read Mode:
To start the communication in the read mode, the EN line has to be set to LOW followed by the sub
address to read (80H, 81H). Afterwards the device is ready to read out data. At the end of data
transition EN must be HIGH.
Preliminary Specification
25
2003-02-18