pef82902 Infineon Technologies Corporation, pef82902 Datasheet - Page 37
pef82902
Manufacturer Part Number
pef82902
Description
4b3t Second Generation Modular Isdn Nt Intelligent Extended
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF82902.pdf
(243 pages)
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Figure 8
2.1.3
The microcontroller clock is derived from the unregulated 15.36 MHz clock from the
oscillator and provided by the pin MCLK. Five clock rates are selectable by a
programmable prescaler which is controlled by the bits MODE1.MCLK and
MODE1.CDS corresponding to the following table.
Table 7
The clock rate is changed after CS becomes inactive.
Data Sheet
0
0
1
1
MODE1.
MCLK
A6 - A0
Bits
7Eh
7Dh
7Ch
7Fh
04h
03h
02h
01h
00h
Microcontroller Clock Generation
0
1
0
1
Direct/Indirect Register Address Mode
MCLK Frequencies
Direct Address Mode
AMOD = ´1´
MODE1.CDS = ’0’
MCLK frequency
D7 - D0
Data
3.84 MHz
0.96 MHz
7.68 MHz
disabled
with
23
A0
1h
0h
Indirect Address Mode
AMOD = ´0´ (default)
ADDRESS
MODE1.CDS = ’1’
MCLK frequency
DATA
Functional Description
15.36 MHz
7.68 MHz
1.92 MHz
disabled
with
regacces.vsd
PEF 81902
D7 - D0
Data
2001-11-12
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