Datasheet

687
32133D–11/2011
UC3D
31.4.7.13 SET_GUARD_TIME
Sets the guard time value in the AW, i.e. how long the AW will wait before starting its transfer
after the master has finished.
The guard time can be either 0x00 (128 bit lengths), 0x01 (16 bit lengths), 0x2 (4 bit lengths) or
0x3 (1 bit length).
31.4.8 aWire Response Summary
The implemented aWire responses are shown in the table below.
31.4.8.1 ACK
The AW has received the command successfully and performed the operation.
31.4.8.2 NACK
The AW has received the command, but got a CRC mismatch.
Table 31-24. SET_GUARD_TIME Details
Command Details
Command value 0x84
Additional data Guard time
Possible responses
0x40: ACK (Section 31.4.8.1)
0x41: NACK (Section 31.4.8.2)
Table 31-25. aWire Response Summary
RESPONSE Instruction Description
0x40 ACK Acknowledge.
0x41 NACK Not acknowledge. Sent after CRC errors and after unknown commands.
0xC0 IDCODE The JTAG idcode.
0xC1 MEMDATA Values read from memory.
0xC2 MEMORY_READWRITE_STATUS
Status after a MEMORY_WRITE or a MEMORY_READ command. OK, busy,
error.
0xC3 BAUD_RATE The current baudrate.
0xC4 STATUS_INFO Status information.
0xC5 MEMORY_SPEED SAB to aWire speed information.
Table 31-26. ACK Details
Response Details
Response value 0x40
Additional data N/A
Table 31-27. NACK Details
Response Details
Response value 0x41
Additional data N/A