ispPAC-POWR1014A-02T48I Lattice, ispPAC-POWR1014A-02T48I Datasheet - Page 35

• Manufacturer Part Number: ispPAC-POWR1014A-02T48I
• Description: Supervisory Circuits ispPAC-POWR1014 w/ ADC INDLOG DEV(ECP3)
• Manufacturer: Lattice

Specifications of ispPAC-POWR1014A-02T48I

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Lattice Semiconductor
Figure 2-28. ispPAC-POWR1014/A TDI/ATDI Pin Selection Diagram
Table 2-10 shows in truth table form the same conditions required to select either TDI or ATDI as in the logic dia-
gram found in Figure 2-28.
Table 2-10. ispPAC-POWR1014/A ATDI/TDI Selection Table
Please refer to AN6068,
note includes specific SVF code examples and information on the use of Lattice design tools to verify device oper-
ation in alternate TDI mode.
VCCPROG Power Supply Pin
Because the VCCPROG pin directly powers the on-chip programming circuitry, the ispPAC-POWR1014/A device
can be programmed by applying power to the VCCPROG pin (without powering the entire chip though the VCCD
and VCCA pins). In addition, to enable the on-chip JTAG interface circuitry, power should be applied to the VCCJ
pin.
When the ispPAC-POWR1014/A is powered by the VCCPROG pin, no power should be applied to the VCCD and
VCCA pins. Additionally, other than JTAG I/O pins, all digital output pins are in Hi-Z state, HVOUT pins configured
as MOSFET driver are driven low, and all other inputs are ignored.
To switch the power supply back to VCCD and VCCA pins, one should turn the VCCPROG supply and VCCJ off
before turning the regular supplies on. When VCCD and VCCA are turned back on for normal operation,
VCCPROG MUST be left floating.
The VCCPROG pin should not be connected to the VCCD and VCCA pins.
TDISEL Pin
H
H
L
TDISEL
ATDI
TDI
Programming the ispPAC-POWR1220AT8 in a JTAG Chain Using
JTAG State Machine
Test-Logic-Reset
1
0
Test-Logic-Reset
Yes
No
X
Q
CLR
SET
ispPAC-POWR1014/A
TMS
2-35
JTAG
TCK
IDCODE Commands
Loaded at Update-IR
IDCODE Instructions
Loaded at Update-IR
4 Consecutive
4 Consecutive
Yes
No
X
ispPAC-POWR1014/A Data Sheet
TDO
ATDI (TDI Disabled)
TDI (ATDI Disabled)
ATDI (TDI Disabled)
ATDI. This application
Data Input Pin
Active JTAG