HCS361 datasheet(7/24 Pages) MICROCHIP

7 / 24 page

HCS361

Preliminary

DS40146C-page 7

3.5.5

SEED: ENABLE SEED TRANSMISSION

If SEED = 0, seed transmission is disabled. The inde-

pendent counter mode can only be used with seed

transmission disabled since SEED_2 is shared with the

second synchronization counter.

With SEED = 1, seed transmission is enabled. The

appropriate button code(s) must be activated to trans-

mit the seed information. In this mode, the seed infor-

mation (SEED_0, SEED_1, and SEED_2) and the

upper 12- or 16-bits of the serial number (SER_1)are

transmitted instead of the hop code.

Seed transmission is available for function codes

(Table 3-7) S[3:0] = 1001 and S[3:0] = 0011 (delayed).

This takes place regardless of the setting of the IND bit.

The two seed transmissions are shown in Figure 3-1.

FIGURE 3-1:

SEED TRANSMISSION

All examples shown with XSER = 1, SEED = 1

When S[3:0] = 1001, delay is not applicable.

CRC+VLOW

SER_1

SEED_2

SEED_1

SEED_0

Data transmission direction

For S[3:0] = 0x3 before delay:

16-bit Data Word

16-bit Counter

Encrypt

CRC+VLOW

SER_1

SER_0

Encrypted Data

For S[3:0] = 0011 after delay (Note 1, Note 2):

CRC+VLOW

SER_1

SEED_2

SEED_1

SEED_0

Data transmission direction

Note 1: For Seed Transmission, SEED_2 is transmitted instead of SER_0.

2: For Seed Transmission, the setting of DELM has no effect.

HCS361 データシート(PDF) 7 Page - Microchip Technology

HCS361 データシート(HTML) 7 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

データシートダウンロード

リンク URL

HCS361 データシート(PDF) 7 Page - Microchip Technology

HCS361 データシート(HTML) 7 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

データシート ダウンロード

リンク URL

データシートダウンロード