pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 248

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

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Embedded Controller Modules
4.19 THE DEBUGGER INTERFACE
The Debugger Interface module links between a debugger running on a host machine and the PC87591x.
The Debugger interface associates a processor number with the processor core. The number associated with the core is 0.
The Debugger interface can also program the on-chip flash.
4.19.1 Features
4.19.2 Structure
The Debugger interface consists of a TAP, ISE Interrupt Control, Rx and Tx data links and a PC87591x reset-by-command
source circuit. Figure 80 shows these functional blocks.
Debugger communication via an IEEE 1149.1b 1994 JTAG serial bus
Test Access Port (TAP) for JTAG serial bus
Hardware reset signal assertion by debugger command
Configurable ABORT event
Interrupt signal (TINT) to the debugger indicates a waiting message
Waiting message to on-chip processor by non-maskable ISE interrupt
8-word (16-byte) Rx (downstream) data link
8-word (16-byte) Tx (upstream) data link
On-chip flash support
— Read, Program and Erase
— Read protect option to secure contents
To
On-Chip
Flash
Flash Programing
Interface
Interrupts
ISE Interrupt
ISE
Control
JTAG Serial Bus
(Continued)
Figure 80. Debugger Interface
Peripheral Bus
Tx Data
Link
TAP
248
TINT
Rx Data
Link
Debugger
Reset
To
Reset Circuit
and Flash
Revision 1.07