11
Specifications ispLSI 2064VE
32-I/O Signal Descriptions
GOE 0/IN 3 This pin performs one of two functions. It can be programmed to function as a Global Output Enable
pin or a Dedicated Input pin.
GOE 1/Y0 This pin performs one of two functions. (1) It can be programmed to function as a GLobal Output Enable
or a Dedicated Clock input. (2) This clock input is connected to one of the clock inputs of all GLBs on
the device.
RESET/Y1 This pin performs two functions: (1) Active Low (0) Reset pin which resets all of the registers in the
device. (2) When active low (0), it functions as a dedicated clock input.
BSCAN Input – Dedicated in-system programming Boundary Scan Enable input pin. This pin is brought low to
enable the programming mode. The TMS, TDI, TDO and TCK controls become active.
TDI/IN 0 Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as a serial data input
pin to load programming data into the device. (2) When BSCAN is high, it functions as a dedicated input
pin.
TMS/IN 2 Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as a mode control pin
for the Boundary Scan state machine. (2) When BSCAN is high, it functions as a dedicated input pin.
TDO/IN 1 Output/Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as an output
pin to read serial shift register data. (2) When BSCAN is high, it functions as a dedicated input pin.
TCK/Y2 Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as a clock pin for the
Boundary Scan state machine. (2) When BSCAN is high, it functions as a dedicated clock input.
GND Ground (GND)
VCC Vcc
NC
1
No Connect
I/O Input/Output pins – These are the general purpose I/O pins used by the logic array.
64-I/O Signal Descriptions
RESET Active Low (0) Reset pin resets all the registers in the device.
GOE 0, GOE1 Global Output Enable input pins.
Y0, Y1, Y2 Dedicated Clock Input – These clock inputs are connected to one of the clock inputs of all the GLBs in
the device.
BSCAN Input – Dedicated in-system programming Boundary Scan enable input pin. This pin is brought low to
enable the programming mode. The TMS, TDI, TDO and TCK controls become active.
TDI/IN 0 Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as a serial data input
pin to load programming data into the device. When BSCAN is high, it functions as a dedicated input pin.
TCK/IN 3 Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as a clock pin for the
Boundary Scan state machine. (2) When BSCAN is high, it functions as a dedicated input pin.
TMS/IN 1 Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as a mode control pin
for the Boundary Scan state machine. (2) When BSCAN is high, it functions as a dedicated input pin.
TDO/IN 2 Output/Input – This pin performs two functions. (1) When BSCAN is logic low, it functions as an output
pin to read serial shift register data. (2) When BSCAN is high, it functions as a dedicated input pin.
GND Ground (GND)
VCC Vcc
NC
1
No Connect
I/O Input/Output Pins – These are the general purpose I/O pins used by the logic array.
Signal Name Description
1. NC pins are not to be connected to any active signals, VCC or GND.
Signal Name Description
1. NC pins are not to be connected to any active signals, VCC or GND.
