SDA5250 Datasheet, PDF (100/143 Pages) Siemens Semiconductor Group – TVTEXT 8-Bit Microcontroller

SDA 525x
Internal Bus
1
Write
to
SBUF
DSQ
SBUF
&
CL
Zero Detector
Timer1 Overflow
.. 16
SMOD=1
.. ₂
SMOD=0
(PCON.7)
Sample
1-to-0
Transition
Detector
RxD
Start
TX Clock
Shift
Data
TX Control
TI ^Send
Serial
1
Port
Interrupt
.. ₁₆
RX Clock
RI Load
Start
RX Control
SBUF
1FFH ^Shift
Bit
Detector
Input Shift Register
(9 Bits)
Shift
Load
SBUF
Read
SBUF
Internal Bus
SBUF
Figure 30
Serial Port Mode 1, Functional Diagram
Semiconductor Group
100
1 _TxD
UES04728
1998-04-08