PCF2100C 데이터 시트보기 (PDF) - Philips Electronics
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PCF2100C Datasheet PDF : 24 Pages
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Philips Semiconductors
LCD drivers
Product specification
PCF21xxC family
7 FUNCTIONAL DESCRIPTION
An LCD segment or LED output is activated when the
corresponding DATA bit is HIGH.
7.1 PCF2100C
When DATA bit 21 is HIGH, the A-latches (BP1) are
loaded. With DATA bit 21 LOW, the B-latches (BP2) are
loaded. CLB pulse 23 transfers data from the shift register
to the selected latches.
7.2 PCF2111C
When DATA bit 33 is HIGH, the A-latches (BP1) are
loaded. With DATA bit 33 LOW, the B-latches (BP2) are
loaded. CLB pulse 35 transfers data from the shift register
to the selected latches.
7.3 PCF2112C
When DATA bit 33 is HIGH, the latches are loaded.
CLB pulse 35 transfers data from the shift register to the
selected latches.
7.4 Bus control logic
The following tests are carried out by the bus control logic:
1. Test on leading zero
2. Test on number of DATA bits
3. Test of disturbed DLEN and DATA signals during
transmission.
If one of the test conditions is not fulfilled, no action follows
the load condition (load pulse with DLEN LOW) and the
driver is ready to receive new data.
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CLB
1
23
4
5
678
test leading zero
DATA
bit number 0 1
output
S1
1
S1
leading zero
23
S2 S3
23
S2 S3
45
S4 S5
45
S4 S5
67
S6 S7
67
S6 S7
32 33 34
35
20 21 22
23
load pulse
PCF2111C and PCF2112C
PCF2100C
31 32
33
S31 S32
19 20
21
S19 S20
load bit
PCF2111C and PCF2112C
PCF2100C
MLD296
Fig.7 CBUS data format.
1997 Mar 28
9
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