Datasheet

AD6620
–12–
REV. A
Name Type Description
VDD P 3.3 V Supply
VSS G Ground
CLK I Input Clock
RESET I Active Low Reset Pin
IN[15:0] I Input Data (Mantissa)
EXP[2:0] I Input Data (Exponent)
A/B I Channel (A/B) Select
SYNC_NCO I/O Sync Signal for NCO
SYNC_CIC I/O Sync Signal for CIC Stages
SYNC_RCF I/O Sync Signal for RCF
MODE I Sets Microport Mode: Mode 1, (MODE = 1), Mode 0, (MODE = 0)
A[2:0] I Microprocessor Interface Address
D[7.0] I/O/T Microprocessor Interface Data
DS or RD I Mode 1: Data Strobe Line, Mode 0: Read Signal
R/W or WR I Read/Write Line (Write Signal)
CS I Chip Select, Enables the Chip for µP Access
DTACK or RDY O Acknowledgment of a Completed Transaction (Signals when µP Port Is Ready for an Access)
PAR/SER I Parallel/Serial Control Select (PAR = 1, SER = 0)
DV
OUT
O Data Valid Pin for the Parallel Output Data
A/B
OUT
O Signals to Which Channel the Output Belongs to (A = 1, B = 0)
I/Q
OUT
O Signals Whether I or Q Data Is Present (I = 1, Q = 0)
TRST I Test Reset Pin
TCK I Test Clock Input
TMS I Test Mode Select Input
TDI I Test Data Input
TDO I Test Data Output
Pin Types: I = Input, O = Output, P = Power Supply, G = Ground, T = Three-state.
SHARED PINS
Parallel Outputs (PAR/SER = 1 at RESET) Serial Port (PAR/SER = 0 at RESET)
Name Type Description Name Type Description
OUT15 O Parallel Output Data SCLK I/O Serial Clock Input (SBM =0)
Serial Clock Output (SBM = 1)
OUT14 O Parallel Output Data SDI I Serial Data Input
OUT13 O Parallel Output Data SDO O/T Serial Data Output
OUT12 O Parallel Output Data SDFS I/O Serial Data Frame Sync Input (SBM = 0)
Serial Data Frame Sync Output (SBM = 1)
OUT11 O Parallel Output Data SDFE O Serial Data Frame End
OUT10 O Parallel Output Data SBM I Serial Bus Master (Master = 1, Cascade = 0)
OUT9 O Parallel Output Data WL1 I Serial Port Word Length, Bit 1
OUT8 O Parallel Output Data WL0 I Serial Port Word Length, Bit 0
OUT7 O Parallel Output Data AD I Append Data
OUT[6:4] O Parallel Output Data NC NC Unused, Do Not Connect
OUT3 O Parallel Output Data SDIV3 I SCLK Divide Value, Bit 3
OUT2 O Parallel Output Data SDIV2 I SCLK Divide Value, Bit 2
OUT1 O Parallel Output Data SDIV1 I SCLK Divide Value, Bit 1
OUT0 O Parallel Output Data (LSB) SDIV0 I SCLK Divide Value, Bit 0
Pin Types: I = Input, O = Output, P = Power Supply, G = Ground, T = Three-state.
PIN FUNCTION DESCRIPTIONS