tc7109a Microchip Technology Inc., tc7109a Datasheet - Page 14

• Manufacturer Part Number: tc7109a
• Description: 12-bit ?-compatible Analog-to-digital Converters
• Manufacturer: Microchip Technology Inc.

TC7109/A
FIGURE 3-8:
FIGURE 3-9:
DS21456C-page 14
CE/LOAD as Output
Positive Transiton causes
CE/LOAD Output (UART TBRL)
Entry into UART Mode
High Byte Data
Low Byte Data
Internal Clock
Status Output
Internal Mode
Internal Latch
Send Input (UART TBRE)
Mode Input
Send Input
HBEN
LBEN
Integrator Output
High Byte Data
Low Byte Data
Internal Clock
Status Output
Internal Mode
Internal Latch
UART
Norm
Mode Input
TC7109A Handshake – Typical UART Interface Timing
TC7109A Handshake Triggered by Mode Input
HBEN
LBEN
= Don't Care
UART
Norm
Sensed
Send
= Don't Care
Zero Crossing Occurs
Status Output unchanged
Zero Crossing Detected
= Three-State
Data Valid
Send
Sensed
High-Impedance
in UART Mode
Data Valid
Sensed
= Three-State High-Impedance
Send
DE Phase III
Sensed
Send
Data Valid
Zero Crossing Occurs
= Three-State
Data Valid
with Pull-up
Sensed
Zero Crossing Detected
Latch Pulse inhibited in UART Mode
Send
© 2006 Microchip Technology Inc.
Sensed
Send
Terminates
UART Mode
Terminates
UART Mode