Echo Driver Configuration
ECHO_HEADER_VALUE
Description: The header value that Echo will recognize. The actual value placed into Echo’s HEADER
register also depends on ECHO_HEADER_LENGTH(see ECHO_HEADER_LENGTH).
Values:
0x00–0xFF
#define ECHO_HEADER_VALUE 0x16 /* Header word recognized by Echo */
Example:
11.2.4 On/off control
ECHO_SOE_VALUE
Description: This defines whether the internal strobe oscillator is enabled on Echo.
Values:
0 = disabled
1 = enabled
#define ECHO_SOE_VALUE 1
Example:
ECHO_RXON_VALUE
Description: Defines the receiver on time when the internal strobe oscillator is used. This value can be
calculated from the Echo data sheet.
Values:
1–15
Example:
#define ECHO_RXON_VALUE 15
ECHO_RXOFF_VALUE
Description: Defines the receiver off time when the internal strobe oscillator is used. This value can be
calculated from the Echo data sheet.
Values:
0–7
#define ECHO_RXOFF_VALUE 7
Example:
11.2.5 Miscellaneous
ECHO_AFFC_VALUE
Description: Specifies the source of configuration for the average filter frequency.
Values:
0 = Filter cutoff frequency set by datarate bits DR[1:0] in CONFIG2 register
1 = Filter cutoff frequency set by bits AFF[1:0] in CONFIG3 register
#define ECHO_AFFC_VALUE 0
Example:
Software Drivers for MC33696, Rev. 1
36
Freescale Semiconductor
FREESCALE [ Freescale ]
