ib technology

10

Program EEPROM

The Micro RWD has internal EEPROM memory for storing system parameters such as

polling rate and authorised identity codes (serial numbers). This command sequence allows

individual bytes of the EEPROM to be programmed with new data. The data is internally read

back after programming to verify successful operation. Note that due to the fundamental

nature of these system parameters, incorrect data may render the system temporarily

inoperable.

B7

B0

Command:

0 1 0 1 0 0 0 0

(Ascii “P”, 0x50)

Argument1:

N N N N N N N N

(N = EEPROM memory location 0 - 255)

Argument2:

D D D D D D D D

(D = data to write to EEPROM)

Acknowledge:

1 X X X F X X F

(F = Status flags)

Internal EEPROM memory map

Polling delay parameter values (EEPROM location 0):

Parameter 0 value

Polling Delay

SLEEP Period

0x00

0 mS

0x10

8 mS

0x20

16 mS

0x30

32 mS

0x40

65 mS

0x50

132 mS

0x60

262 mS

0x70

524 mS

0x80

1 second

0x90

2 seconds

0xA0

4 seconds

0xB0

8 seconds

Polling delay can be set from 0 to 8 seconds to give complete control over current

consumption and battery life.