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HCS412T Datasheet(PDF) 35 Page - Microchip Technology

Part # HCS412T
Description  KEELOQ Code Hopping Encoder and Transponder
PDF  44 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

HCS412T Datasheet(HTML) 35 Page - Microchip Technology

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© 2002 Microchip Technology Inc.
Preliminary
DS41099C-page 35
HCS412
7.1
EEPROM Organization
TABLE 7-1:
HCS412 EEPROM ORGANIZATION
TABLE 7-2:
PROGRAMMING/VERIFY TIMING REQUIREMENTS
16Bit
Word
BITS
15
14
13
12
11
10
98
765
43
21
0
1
KEY1_1
KEY1_0 (KEY1 LSB)
2
KEY1_3
KEY1_2
3
KEY1_5
KEY1_4
4
KEY1_7 (KEY1 MSB)
KEY1_6
5
SEED_1 / KEY2_1
SEED_0 / KEY2_0 (SEED AND KEY2 LSB)
6
SEED_3 / KEY2_3
SEED_2 / KEY2_2
7
SEED_5 / KEY2_5 / TCODE_1
SEED_4 / KEY2_4 / TCODE_0 (TCODE LSB)
8
SEED_7 / KEY2_7 /
TCODE_3 (MSB for all 3)
SEED_6 / KEY2_6 / TCODE_2
9
RFBSL
LFSP
OSCT
10
1
0
32
10
10
OVR
10bit Discrimination Value
1
0
9
876
54
321
0
11
SER1
SER0
12
SER3
SER2
13
USR0 MSB
USR0 LSB
14
USR1 MSB
USR1 LSB
15
USR2 MSB
USR2 LSB
16
USR3 MSB
USR3 LSB
17
CNT1 (Counter MSB)
CNT0 (Counter LSB)
18
Reserved, set to 0
Reserved, set to 0
VDD = 5.0V ± 10%, 25
° C ± 5 °C
Parameter
Symbol
Min.
Max.
Units
Program mode setup time
TPS
25.0
ms
Hold time 1
TPH14.0
—
ms
Hold time 2
TPH250
—
µs
Bulk Write time
TPBW
4.0
—
ms
Program delay time
TPROG
4.0
—
ms
Program cycle time
TWC
50
—
ms
Clock low time
TCLKL
50
—
µs
Clock high time
TCLKH
50
—
µs
Data setup time
TDS
0—
µs
Data hold time
TDH
18
—
µs
Data out valid time
TDV
30
µs
Hold time
TPHOLD
100
—
µs
Acknowledge low time
TACKL
800
—
µs
Acknowledge high time
TACKH
800
—
µs



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