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參數(shù)資料
| 型號： | PCD3359AT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit microcontroller with DTMF generator and 128 bytes EEPROM |
| 中文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | 7.50 MM, PLASTIC, SO-28 |
| 文件頁數(shù)： | 13/32頁 |
| 文件大小： | 165K |
| 代理商： | PCD3359AT |
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1998 May 11
13
Philips Semiconductors
Product specification
8-bit microcontroller with DTMF
generator and 128 bytes EEPROM
PCD3359A
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 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.
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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