ST70235A STMicroelectronics, ST70235A Datasheet - Page 21

• Manufacturer Part Number: ST70235A
• Description: Transceiver 144-Pin TQFP
• Manufacturer: STMicroelectronics

Specifications of ST70235A

• Package: 144TQFP
• Power Supply Type: Analog
• Typical Operating Supply Voltage: 1.8|3.3 V
• Minimum Operating Supply Voltage: 1.62|3 V
• Maximum Operating Supply Voltage: 1.98|3.6 V
• Case: QFP

Analog Front End Control Interface
The Analog Front End Interface is designed to be
connected to the ST70134 Analog Front End
component.
Transmit Interface
The 16 bit words are multiplexed on 4 AFTXD
output signals. As a result 4 cycles are needed to
transfer 1 word. Refer to table 1 for the bit/pin
allocation for the 4 cycles.
The first of 4 cycles is identified by the CLWD
signal. Refer to Figure 18.
Figure 18 : Transmit Word Timing Diagram
Figure 19 : Receive Word Timing Diagram
CLWD
AFTXD
GP_OUT
CLWD
AFRXD
GP_IN(0)
MCLK
MCLK
Cycle0
Test0
Cycle0
Test0
Cycle1
Cycle1
Test1
Test1
Cycle2
Cycle2
Test2
Test2
Cycle3
Cycle3
Test3
Test3
The ST70235A fetches the 16 bit word to be
multiplexed on AFTXD from the Tx Digital
Front-End module.
Receive Interface
The 16 bit receive word is multiplexed on 4
AFRXD input signals. As a result 4 cycles are
needed to transfer 1 word.
Refer to Table 2 for the bit / pin allocation for the 4
cycles. The first of 4 cycles is identified by the
CLWD must repeat after 4 MCLK cycles.
ST70235A
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