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Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
25-20
Freescale Semiconductor
The IEEE
®
1149.1-2001 specification may be ordered for further detail on electrical and pin protocol
compliance requirements.
The NPC implements a Nexus controller state machine that transitions based on the state of the IEEE
®
1149.1-2001 state machine shown in
. The Nexus controller state machine is defined by the
IEEE-ISTO 5001-2003 standard. It is shown in
The instructions implemented by the NPC TAP controller are listed in
NEXUS-ENABLE instruction is 0b0000. Each unimplemented instruction acts like the BYPASS
instruction. The size of the NPC instruction register is 4-bits.
Data is shifted between TDI and TDO starting with the least significant bit as illustrated in
.
This applies for the instruction register and all Nexus tool-mapped registers.
Figure 25-8. Shifting Data Into a Register
25.7.2.3.1
Enabling the NPC TAP Controller
Assertion of the power-on reset signal, entry into censored mode, or negating JCOMP resets the NPC TAP
controller. When not in power-on reset or censored mode, the NPC TAP controller is enabled by asserting
JCOMP and loading the ACCESS_AUX_TAP_NPC instruction in the JTAGC. Loading the
NEXUS-ENABLE instruction then grants access to NPC registers.
Table 25-14. Implemented Instructions
Instruction Name
Private/Public
Opcode
Description
NEXUS-ENABLE
Public
0x0
Activate Nexus controller state machine to read and
write NPC registers.
BYPASS
Private
0xF
NPC BYPASS instruction. Also the value loaded into
the NPC IR upon exit of reset.
Selected register
TDO
TDI
MSB
LSB
Содержание MPC5566
Страница 12: ...MPC5566 Microcontroller Reference Manual Devices Supported MPC5566 MPC5566 RM Rev 2 0 23 Apr 2008...
Страница 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Страница 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Страница 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Страница 331: ...System Integration Unit SIU MPC5566 Microcontroller Reference Manual Rev 2 6 128 Freescale Semiconductor...
Страница 343: ...Crossbar Switch XBAR MPC5566 Microcontroller Reference Manual Rev 2 7 12 Freescale Semiconductor...
Страница 361: ...Error Correction Status Module ECSM MPC5566 Microcontroller Reference Manual Rev 2 8 18 Freescale Semiconductor...
Страница 455: ...Interrupt Controller INTC MPC5566 Microcontroller Reference Manual Rev 2 10 42 Freescale Semiconductor...
Страница 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Страница 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Страница 679: ...Boot Assist Module BAM MPC5566 Microcontroller Reference Manual Rev 2 16 20 Freescale Semiconductor...
Страница 997: ...Deserial Serial Peripheral Interface DSPI MPC5566 Microcontroller Reference Manual Rev 2 20 72 Freescale Semiconductor...
Страница 1037: ...Enhanced Serial Communication Interface eSCI MPC5566 Microcontroller Reference Manual Rev 2 21 40 Freescale Semiconductor...
Страница 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Страница 1081: ...Voltage Regulator Controller VRC and POR Module MPC5566 Microcontroller Reference Manual Rev 2 23 8 Freescale Semiconductor...
Страница 1093: ...IEEE 1149 1 Test Access Port Controller JTAGC MPC5566 Microcontroller Reference Manual Rev 2 24 12 Freescale Semiconductor...
Страница 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...
Страница 1267: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 10...
Страница 1268: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 11...