peb20525 Infineon Technologies Corporation, peb20525 Datasheet - Page 66

• Manufacturer Part Number: peb20525
• Description: 2 Channel Serial Optimized Communication Controller For Hdlc/ppp
• Manufacturer: Infineon Technologies Corporation

3.2.3.8
This clock mode is identical to clock mode 2a/2b except that the clock source of the BRG
is supplied at pin XTAL1.
The BRG is driven by the internal oscillator and delivers a reference clock for the DPLL
which is 16 times the resulting DPLL output frequency which in turn supplies the internal
receive clock. Depending on the programming of register
clock will be either an external input clock signal provided at pin TxCLK in clock mode
6a or the clock delivered by the BRG divided by 16 in clock mode 6b. In the latter case,
the transmit clock can be driven out to pin TxCLK if enabled via bit ’TOE’ in register
CCR0L.
Figure 27
Data Sheet
Clock Mode 6 (6a/6b)
clock mode 6a
clock mode 6b
Clock Mode 6a/6b Configuration
or
or
DPLL
Ctrl.
DPLL
OSC
BRG
OSC
BRG
Ctrl.
16:1
Ctrl.
Ctrl.
RxCLK
CTS, CxD, TCG
CD, FSC, RCG
TxCLK
RTS
RxD
TxD
RxCLK
CTS, CxD, TCG
CD, FSC, RCG
TxCLK
RTS
RxD
TxD
66
(tx clock monitor output)
V
V
SS
SS
CCR0L
bit ’SSEL’, the transmit
Functional Overview
clock supply
1
PEB 20525
PEF 20525
2000-09-14