PCD3353CT 데이터 시트보기 (PDF) - Philips Electronics
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PCD3353CT Datasheet PDF : 36 Pages
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Philips Semiconductors
8-bit microcontrollers with DTMF generator
and 128 bytes EEPROM
Product specification
PCA3351C; 52C; 53C;
PCD3351A; 52A; 53A
7.1 EEPROM registers
7.1.1 EEPROM CONTROL REGISTER (EPCR)
The behaviour of the EEPROM and Timer 2 section is defined by the EEPROM Control Register. See Tables 11, 12 and
13.
Table 11 EEPROM Control Register, EPCR (address 04H, access type R/W)
7
6
5
4
3
2
1
0
STT2
ET2I
T2F
EWP
MC3
MC2
MC1
0
Table 12 Description of the EPCR bits
BIT
SYMBOL
DESCRIPTION
7
STT2 Start T2. If STT2 = 0, then Timer 2 is stopped; T2 value held. If STT2 = 1, then T2
decrements from reload value.
6
ET2I
Enable T2 interrupt. If ET2I = 0, then T2F event cannot request interrupt. If ET2I = 1,
then T2F event can request interrupt.
5
T2F
Timer 2 flag. Set when T2 underflows (or by program); reset by program.
4
EWP Erase or write in progress (EWP). Set by program (EWP starts EEPROM erase and/or
write and Timer 2). Reset at the end of EEPROM erase and/or write.
3
MC3
Mode control 3 to 1. These three bits in conjunction with bit EWP select the mode as
2
MC2
shown in Table 13.
1
MC1
0
−
This bit is set to a logic 0.
Table 13 Mode selection; X = don’t care
EWP
0
0
1
1
1
X
X
X
MC3
0
0
0
1
1
0
1
1
MC2
0
1
1
0
1
0
0
1
MC1
0
0
X
0
1
1
1
0
read byte
increment mode
write page
erase/write page
erase page
not allowed
DESCRIPTION
1999 Oct 28
14
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