MC81F4332 Datasheet, PDF (152/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC81F4x16
24.2 Modes and Procedures
Uart Mode 0
Write to Shift Register (UDAT)
Shift
RxD (Data Out)
D0
D1
D2
D3
D4
D5
D6
D7
TxD (Shift Clock)
UTIR
URIR
Clear URIF and set SDR
SDR
Shift
RxD (Data In)
D0
D1
D2
D3
D4
D5
D6
D7
TxD (Shift Clock)
1
2
3
4
5
6
7
8
Figure 24-2 Timing Diagram for Serial Port Mode 0 Operation
In mode 0, both input and output data are passed through the RxD (R14) pin and TxD (R15) pin
generates the clock. Data is transmitted or received in 8-bit units only. The LSB of the 8-bit value is
transmitted (or received) first.
Note that, only master mode is provided.
152
October 19, 2009 Ver.1.35