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