HCS500T-ISLASHST datasheet(11/42 Pages) MICROCHIP

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DS40000153E-page 11

HCS500

4.2.3

COMMAND ACTIVATION TIMES

The command activation time (Table 4-1) is defined as

the maximum time the microcontroller has to wait for a

response from the decoder. The decoder will abort and

service the command request. The response time

depends on the state of the decoder when the

Command mode is requested.

4.2.4

DECODER COMMANDS

The command byte specifies the operation required by

the controlling microcontroller. Table 4-2 lists the

commands.

TABLE 4-1:

COMMAND ACTIVATION TIMES

Decoder State

Min

Max

While receiving transmissions

—

2.5 ms BPWMAX = 2.7 ms

During the validation of a received transmission

—

3 ms

During the update of the sync counters

—

40 ms

During learn

—

170 ms

Note:

*These parameters are characterized but not tested.

TABLE 4-2:

DECODER COMMANDS

Instruction

Command Byte

Operation

READ

F016

Read a byte from user EEPROM

WRITE

E116

Write a byte to user EEPROM

ACTIVATE_LRN

D216

Activate a learn sequence on the decoder

ERASE_ALL

C316

Activate an erase all function on the decoder

PROGRAM

B416

Program manufacturer’s code and Configuration byte

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