參數(shù)資料
型號(hào)： PCD3315
元件分類： 8位微控制器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8位微控制器
文件頁(yè)數(shù)： 14/36頁(yè)
文件大?。?/td> 169K
代理商： PCD3315
1999 Oct 28
14
Philips Semiconductors
Product specification
8-bit microcontrollers with DTMF generator
and 128 bytes EEPROM
PCA3351C; 52C; 53C;
PCD3351A; 52A; 53A
7.1
EEPROM registers
7.1.1
EEPROM C
ONTROL
R
EGISTER
(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)
Table 12
Description of the EPCR bits
Table 13
Mode selection; X = don’t care
7
6
5
4
3
2
1
0
STT2
ET2I
T2F
EWP
MC3
MC2
MC1
0
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.
Enable T2 interrupt. If ET2I = 0, then T2F event cannot request interrupt. If ET2I = 1,
then T2F event can request interrupt.
Timer 2 flag. Set when T2 underflows (or by program); reset by program.
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.
Mode control 3 to 1. These three bits in conjunction with bit EWP select the mode as
shown in Table 13.
6
ET2I
5
4
T2F
EWP
3
2
1
0
MC3
MC2
MC1
This bit is set to a logic 0.
EWP
MC3
MC2
MC1
DESCRIPTION
0
0
1
1
1
X
X
X
0
0
0
1
1
0
1
1
0
1
1
0
1
0
0
1
0
0
X
0
1
1
1
0
read byte
increment mode
write page
erase/write page
erase page
not allowed
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