PIC32
TABLE 19-2: MTAP_COMMANDDRCOMMANDS
Command
MCHP_STATUS
Value
Description
8’h0x00
8’h0xD1
8’h0xD0
NOPand return Status.
MCHP_ASSERT_RST
Requests the reset controller to assert device Reset.
MCHP_DE_ASSERT_RST
Removes the request for device Reset, which causes the reset
controller to de-assert device Reset if there is no other source
requesting Reset (i.e., MCLR).
MCHP_ERASE
8’h0xFC
8’h0xFE
8’h0xFD
Cause the Flash controller to perform a Chip Erase.
MCHP_FLASH_ENABLE(1)
MCHP_FLASH_DISABLE(1)
Enables fetches and loads to the Flash (from the processor).
Disables fetches and loads to the Flash (from the processor).
Note 1: This command is not required for PIC32MZ EC family devices.
TABLE 19-3: MCHP STATUS VALUE
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Range
NVMERR(1)
0
CFGRDY
FCBUSY
FAEN(2)
DEVRST
7:0
CPS
0
bit 7
CPS: Code-Protect State bit
1= Device is not code-protected
0= Device is code-protected
bit 6
bit 5
Unimplemented: Read as ‘0’
NVMERR: NVMCON Status bit(1)
1= An Error occurred during NVM operation
0= An Error did not occur during NVM operation
bit 4
bit 3
Unimplemented: Read as ‘0’
CFGRDY: Code-Protect State bit
1= Configuration has been read and CP is valid
0= Configuration has not been read
bit 2
bit 1
FCBUSY: Flash Controller Busy bit
1= Flash controller is busy (Erase is in progress)
0= Flash controller is not busy (either erase has not started or it has finished)
FAEN: Flash Access Enable bit(2)
This bit reflects the state of CFGCON.FAEN.
1= Flash access is enabled
0= Flash access is disabled (i.e., processor accesses are blocked)
bit 0
DEVRST: Device Reset State bit
1= Device Reset is active
0= Device Reset is not active
Note 1: This bit is not implemented in PIC32MX320/340/360/420/440/460 devices.
2: This bit is not implemented in PIC32MZ EC family devices.
TABLE 19-4: EJTAG TAP INSTRUCTIONS
Command
ETAP_ADDRESS
Value
Description
5’h0x08
5’h0x09
5’h0x0A
5’h0x0C
5’h0x0E
Select Address register.
Select Data register.
ETAP_DATA
ETAP_CONTROL
ETAP_EJTAGBOOT
ETAP_FASTDATA
Select EJTAG Control register.
Set EjtagBrk, ProbEn and ProbTrap to ‘1’ as the reset value.
Selects the Data and Fastdata registers.
DS61145L-page 56
2007-2013 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
