HCS412I MICROCHIP [Microchip Technology], HCS412I Datasheet - Page 35

• Manufacturer Part Number: HCS412I
• Description: KEELOQ Code Hopping Encoder and Transponder
• Manufacturer: MICROCHIP [Microchip Technology]

7.1
TABLE 7-1:
TABLE 7-2:
V
Program mode setup time
Hold time 1
Hold time 2
Bulk Write time
Program delay time
Program cycle time
Clock low time
Clock high time
Data setup time
Data hold time
Data out valid time
Hold time
Acknowledge low time
Acknowledge high time
Word
16Bit
DD
2002 Microchip Technology Inc.
10
12
13
14
15
16
17
18
11
1
2
3
4
5
6
7
8
9
= 5.0V ± 10%, 25 C ± 5 C
EEPROM Organization
15
Parameter
1
OVR
14
0
HCS412 EEPROM ORGANIZATION
PROGRAMMING/VERIFY TIMING REQUIREMENTS
SEED_5 / KEY2_5 / TCODE_1
13
1
9
KEY1_7 (KEY1 MSB)
CNT1 (Counter MSB)
RFBSL
SEED_1 / KEY2_1
SEED_3 / KEY2_3
Reserved, set to 0
USR0 MSB
USR1 MSB
USR2 MSB
USR3 MSB
12
KEY1_1
KEY1_3
KEY1_5
0
8
SER1
SER3
TCODE_3 (MSB for all 3)
Symbol
11
T
7
T
T
T
T
T
T
T
T
SEED_7 / KEY2_7 /
PHOLD
T
T
PROG
T
T
T
ACKH
CLKH
ACKL
CLKL
PBW
PH
PH
WC
PS
DS
DH
DV
1
2
10bit Discrimination Value
10
6
Preliminary
9
5
8
4
BITS
Min.
100
800
800
4.0
4.0
4.0
50
50
50
50
18
2
0
7
1
3
LFSP
SEED_4 / KEY2_4 / TCODE_0 (TCODE LSB)
SEED_0 / KEY2_0 (SEED AND KEY2 LSB)
6
0
2
SEED_6 / KEY2_6 / TCODE_2
5
1
KEY1_0 (KEY1 LSB)
CNT0 (Counter LSB)
SEED_2 / KEY2_2
Reserved, set to 0
Max.
5.0
30
—
—
—
—
—
—
—
—
—
—
—
—
USR0 LSB
USR1 LSB
USR2 LSB
USR3 LSB
4
KEY1_2
KEY1_4
KEY1_6
0
SER0
SER2
3
3
HCS412
DS41099C-page 35
2
2
OSCT
Units
ms
ms
ms
ms
ms
s
s
s
s
s
s
s
s
s
1
1
0
0