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| MEC1404 Datasheet, PDF (481/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC | |||
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MEC140X/1X
41.4.4 INSTRUCTION REGISTERS
TABLE 41-2: PUBLIC INSTRUCTIONS
Instruction
Description
IDCODE <0x01>
SAMPLE/PRELOAD <0x02>
SWTAP_CHIP <0x04>
SWTAP <0x05>
EXTEST <0x06>
MCHP_CMD <0x07>
BYPASS <0x1F>
JTAG Standard IDCODE Register
Not implemented, but reserved as required by JTAG standard.
Turn the Chip TAP back on and disable all other TAPs.
Turn off the Chip TAP and enable all other TAPs behind it.
Not implemented, but reserved as required by JTAG standard.
Chip Status interrogation and manual reset control.
Standard JTAG Bypass.
41.4.4.1 IDCODE
The MTAP JTAG ID Code is 0214_2445h.
Offset 01h
Bits
31:28 VERSION
27:12 PartNumber
11:1 ManufID
0 RESERVED
Hard-coded to 1h.
Description
Type
R
R
R
R
Default
0h
2142h
222h
1h
Reset
Event
nSYSR
ST
nSYSR
ST
nSYSR
ST
nSYSR
ST
41.4.4.2 SAMPLE/PRELOAD <0x02>
Not implemented, but reserved as required by JTAG standard.
41.4.4.3 SWTAP_CHIP <0x04>
Turn the Chip TAP back on and disable all other TAPs.
41.4.4.4 SWTAP <0x05>
Turn off the Chip TAP and enable all other TAPs behind it.
41.4.4.5 EXTEST <0x06>
Not implemented, but reserved as required by JTAG standard.
ï£ 2015 - 2016 Microchip Technology Inc.
DS00001956D-page 481
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