Data Sheet

AD9914

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

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Rev. G | 10 of 48

Figure 3. Pin Configuration

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

I/O1

Description

1, 2, 13 to 15, 68 to

72, 75 to 81, 87, 88

D5 to D7, D16 to D31,

D27 to D31

I/O

Parallel Port Pins. The 32-bit parallel port offers the option for serial or parallel programming of the internal registers.

In addition, the parallel port can be configured to provide direct FSK, PSK, or ASK (or combinations thereof)

modulation data. The 32-bit parallel port configuration is set by the state of the four function pins (F0 to F3).

3

D15/A7

I/O

Parallel Port Pin/Address Line. The state of the F0 to F3 function pins determines if this pin acts as a line for direct

FSK, PSK, or ASK data or as an address line for programming the internal registers.

4

D14/A6

I/O

Parallel Port Pin/Address Line. The state of the F0 to F3 function pins determines if this pin acts as a line for direct

FSK, PSK, or ASK data or as an address line for programming the internal registers.

5

D13/A5

I/O

Parallel Port Pin/Address Line. The state of the F0 to F3 function pins determines if this pin acts as a line for direct

FSK, PSK, or ASK data or as an address line for programming the internal registers.

8

D12/A4

I/O

Parallel Port Pin/Address Line. The state of the F0 to F3 function pins determines if this pin acts as a line for direct

FSK, PSK, or ASK data or as an address line for programming the internal registers.

9

D11/A3

I/O

Parallel Port Pin/Address Line. The state of the F0 to F3 function pins determines if this pin acts as a line for direct

FSK, PSK, or ASK data or as an address line for programming the internal registers.

10

D10/A2

I/O

Parallel Port Pin/Address Line. Multipurpose pin depending on the state of the function pins (F0 to F3). The state of

the F0 to F3 function pins determines if this pin acts as a line for direct FSK, PSK, or ASK data or as an address line

for programming the internal registers.

11

D9/A1

I/O

Parallel Port Pin/Address Line. Multipurpose pin depending on the state of the function pins (F0 to F3). The state of

the F0 to F3 function pins determines if this pin acts as a line for direct FSK, PSK, or ASK data or as an address line

for programming the internal registers.

12

D8/A0

I/O

Parallel Port Pin/Address Line. The state of the F0 to F3 function pins determines if this pin acts as a line for direct

FSK, PSK, or ASK data or as an address line for programming the internal registers.

18

D4/SYNCIO

I

Parallel Port Pin/Serial Port Synchronization Pin. This pin is D4 for direct FSK, PSK, or ASK data. If serial mode is

invoked via F0 to F3, this pin resets the serial port.

19

D3/SDO

I/O

Parallel Port Pin/Serial Data Output. This pin is D3 for direct FSK, PSK, or ASK data. If serial mode is invoked via F0

to F3, this pin is used for readback mode for serial operation.

20

D2/SDIO/WR

I/O

Parallel Port Pin/Serial Data Input and Output/Write Input. This pin is D2 for direct FSK, PSK, or ASK data. If serial

mode is invoked via F0 to F3, this pin is used for the SDIO for serial operation. If parallel mode is enabled, this pin

invokes a write operation for updating the values of the internal registers.

21

D1/SCLK/RD

I

Parallel Port Pin/Serial Clock/Read Input. This pin is D1 for direct FSK, PSK, or ASK data. If serial mode is invoked

via F0 to F3, this pin is used for SCLK for serial operation. If parallel mode is enabled, this pin invokes a read

operation for reading back the value of the internal registers.