Datasheet

14 - SERIAL CHANNELS ST10F269
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14.1.2 - ASCO in Synchronous Mode
In synchronous mode, data are transmitted or received synchronously to a shift clock which is generated
by the ST10F269. Half-duplex communication up to 5M Baud (at 40MHz f
CPU
) or 4M Baud (at 32MHz) is
possible in this mode.
Figure 45 : Synchronous Mode of Serial Channel ASC0
2
CPU
Clock
S0R
Baud Rate Timer
Reload Register
4
Clock
Serial Port Control
Shift Clock
S0M = 000B S0OE
S0REN
S0OEN
S0LB
S0RIR
S0TIR
S0EIR
Receive Interrupt
Request
Transmit Interrupt
Request
Error Interrupt
Request
Transmit Shift
Register
Receive Shift
Register
Transmit Buffer
Register S0TBUF
Receive Buffer
Register S0RBUF
MUX
0
1
Pin
Internal Bus
Receive
Output
Transmit
Pin
Input/Output
TDX0/P3.10
RXD0/P3.11