Analog Devices ADSP-BF506F Hardware Reference Manual page 1058

Interface Overview
Table 22-1. ACM Interface Pins
Pin
ACM_A[2:0]
ACM_RANGE
ACM_SGLDIFF
TRIGGER[3:0]
CS
ACLK
22-4
I/O Description
O ADC Channel Select. 3-bit ADC Channel select signal
O Range Selector
O Mode. Single Ended/Differential Mode selector
I Trigger Inputs. Generated from external trigger events
O Start of Conversion. Chip select for ADC, and connected as Frame
Sync for SPORT
O ADC Clock. Clock output for ADC and SPORT
ADSP-BF50x Blackfin Processor Hardware Reference