C515A_9708 Datasheet, PDF (108/182 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C515A
Internal Bus
TB8
Write
to
SBUF
S
Q
SBUF
&
D
CLK
Zero Detector
÷ 16
Baud
Rate
Clock
Sample
1-to-0
Transition
Detector
RXD
Start
Stop Bit
Generation
Shift
Data
TX Control
TX Clock
TI ^Send
Serial
1
Port
Interrupt
÷ 16
RX Clock
Start
RX Control
RI Load
SBUF
1FF ^Shift
Bit
Detector
Load
SBUF
Input Shift Register
(9Bits)
Shift
Read
SBUF
SBUF
Internal Bus
Figure 6-29
Serial Interface, Mode 2 and 3, Functional Diagram
MCS02105
Semiconductor Group
6-57
1 ^TXD
1997-08-01