isppac-powr1220at8 Lattice Semiconductor Corp., isppac-powr1220at8 Datasheet - Page 49

• Manufacturer Part Number: isppac-powr1220at8
• Description: In-system Programmable Power Supply Monitoring, Sequencing And Margining Controller
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
DISCHARGE – This instruction is used to discharge the internal programming supply voltage after an erase or pro-
gramming cycle and prepares ispPAC-POWR1220AT8 for a read cycle. This instruction also forces the outputs into
the OUTPUTS_HIGHZ.
CFG_ADDRESS – This instruction is used to set the address of the CFG array for subsequent program or read
operations. This instruction also forces the outputs into the OUTPUTS_HIGHZ.
CFG_DATA_SHIFT – This instruction is used to shift data into the CFG register prior to programming or reading.
This instruction also forces the outputs into the OUTPUTS_HIGHZ.
CFG_ERASE – This instruction will bulk erase the CFG array. The action occurs at the second rising edge of TCK
in Run-Test-Idle JTAG state. The device must already be in programming mode (PROGRAM_ENABLE instruction).
This instruction also forces the outputs into the OUTPUTS_HIGHZ.
CFG_PROGRAM – This instruction programs the selected CFG array column. This specific column is preselected
by using CFG_ADDRESS instruction. The programming occurs at the second rising edge of the TCK in Run-Test-
Idle JTAG state. The device must already be in programming mode (PROGRAM_ENABLE instruction). This
instruction also forces the outputs into the OUTPUTS_HIGHZ.
CFG_VERIFY – This instruction is used to read the content of the selected CFG array column. This specific column
is preselected by using CFG_ADDRESS instruction. This instruction also forces the outputs into the
OUTPUTS_HIGHZ.
BULK_ERASE – This instruction will bulk erase all E
POWR1220AT8. The device must already be in programming mode (PROGRAM_ENABLE instruction). This
instruction also forces the outputs into the OUTPUTS_HIGHZ.
OUTPUTS_HIGHZ – This instruction turns off all of the open-drain output transistors. Pins that are programmed as
FET drivers will be placed in the active low state. This instruction is effective after Update-Instruction-Register
JTAG state.
PROGRAM_ENABLE – This instruction enables the programming mode of the ispPAC-POWR1220AT8. This
instruction also forces the outputs into the OUTPUTS_HIGHZ.
IDCODE – This instruction connects the output of the Identification Code Data Shift (IDCODE) Register to TDO
(Figure 1-40), to support reading out the identification code.
Figure 1-40. IDCODE Register
PROGRAM_DISABLE – This instruction disables the programming mode of the ispPAC-POWR1220AT8. The Test-
Logic-Reset JTAG state can also be used to cancel the programming mode of the ispPAC-POWR1220AT8.
UES_READ – This instruction both reads the E
between the TDI and TDO pins (as shown in Figure 1-41), to support programming or reading of the user electronic
signature bits.
Figure 1-41. UES Register
Bit
15
Bit
31
Bit
14
Bit
30
Bit
13
Bit
12
Bit
29
Bit
11
Bit
28
Bit
10
Bit
27
Bit
9
2
CMOS bits into the UES register and places the UES register
Bit
8
1-49
2
CMOS bits (CFG, PLD, UES, and ESF) in the ispPAC-
Bit
7
Bit
6
Bit
4
ispPAC-POWR1220AT8 Data Sheet
Bit
5
Bit
3
Bit
4
Bit
2
Bit
3
Bit
Bit
1
2
Bit
1
Bit
0
Bit
0
TDO
TDO