PEB 20542 F V1.3 Infineon Technologies, PEB 20542 F V1.3 Datasheet - Page 69

• Manufacturer Part Number: PEB 20542 F V1.3
• Description: IC CTRLR DMA SERIAL 2-CH TQFP144
• Manufacturer: Infineon Technologies
• Series: SEROCCO™r

Specifications of PEB 20542 F V1.3

• Function: Serial Optimized Communications Controller
• Interface: HDLC, PPP
• Number Of Circuits: 2
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 50mA
• Power (watts): 150mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 144-LFQFP
• Includes: Bit Processor Functions, Serial Communication Controllers (SCCs)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PEB20542FV1.3X; SP000007633

3.2.4
Each serial channel provides a baud rate generator (BRG) whose division factor is
controlled by registers
depends on the selected clock mode.
Table 9
Register Bit-Fields
Offset
BRRL
38
BRRH
39
The clock division factor k is calculated by:
3.2.5
The SCC offers the advantage of recovering the received clock from the received data
by means of internal DPLL circuitry, thus eliminating the need to transfer additional clock
information via a separate serial clock line. For this purpose, the DPLL is supplied with
a ‘reference clock’ from the BRG which is 16 times the expected data clock rate (clock
mode 2, 3a, 6, 7a). The transmit clock may be obtained by dividing the output of the BRG
by a constant factor of 16 (clock mode 2b, 6b; bit ’SSEL’ in register
directly from the DPLL (clock mode 3a, 7a).
The main task of the DPLL is to derive a receive clock and to adjust its phase to the
incoming data stream in order to enable optimal bit sampling.
The mechanism for clock recovery depends on the selected data encoding (see
Encoding” on Page
The following functions have been implemented to facilitate a fast and reliable
synchronization:
Data Sheet
H
H
/88
/89
H
H
Pos.
5..0
11..8
Baud Rate Generator (BRG)
Clock Recovery (DPLL)
BRRL/BRRH Register and Bit-Fields
Name
BRN
BRM
75).
BRRL
and BRRH. Whether the BRG is in the clocking path or not
Default
0
0
k
f
=
BRG
(
N
69
+
=
1
f
in
)
Description
Baud Rate Factor N
range N = 0..63
Baud Rate Factor M,
range M = 0..15
´
k ¤
2
M
Functional Overview
CCR0L
PEB 20542
PEF 20542
set) or also
2000-09-14
“Data