AS8228 datasheet(76/123 Pages) AMSCO

76 / 123 page

Data Sheet AS8218 / AS8228

Revision 3.0, 31-May-06

Page 76 of 123

Figure 19: Timing diagram

After having finished the write sequence, the EEPROM goes to programming state for about 5ms to 10ms

(depending on the EEPROM type). The AS8218 / AS8228 read out the Status register in a loop until bit0 = WIP

(write in progress) goes low. Then the UART transmits the acknowledge instruction FAh.

Example Read EEPROM Locations 1FF0 and 1FF1:

On EEP_SO the expected 21h and 42h are transmitted.

UART

READ_P

Address

Block Length

Data1

Data2

RXD

TXD

SPI

READ

EEP_SI

EEP_SO

x ......... don’t care

- ......... no activity, idle = ‘1’

Figure 20: Timing diagram

s ......... stop bit

06 03

WRITE_P

ADDRESS

DATA1

BLOCK LENGTH

DATA2

Read Status

READ_P

ADDRESS

DATA1

BLOCK LENGTH

DATA2

1 1 0 0 1 1 1 1 s

1 1 1 1 1 0 0 0 s 0 0 0 0 0 1 1 1 1 s

(03)

(F0)

(1F)

(42)

(21)

0 0 0 0 0 0 0 0 s

0 1 0 0 0 0 0 0 s

1 0 0 0 0 1 0 0 s 0 1 0 0 0 0 1 0

AS8228 Datasheet(PDF) 76 Page - ams AG

AS8228 Datasheet(HTML) 76 Page - ams AG

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 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL