PNX1502E Datasheet, PDF (745/819 Pages) NXP Semiconductors – Connected Media Processor

Philips Semiconductors
Volume 1 of 1
PNX15xx Series
Chapter 24: TM3260 Debug
Transfer of Data to TM3260 via JTAG
Poll control register to check if input buffer is empty or not and scan in data when it is
empty and set the ifull control bit to 1 triggering an interrupt. Note that scanning in any
instruction automatically scans out the 3 least significant bits (including the ifull or
ofull bit) of the selected TM_DBG_CTRL register.
Table 3: Transfer of Data In via JTAG
Action
Number of
TCK Cycles
IR shift in SEL_IFULL_IN instruction
12
While TM_DBG_CTRL2.ifull = 1, scan in SEL_IFULL_IN instruction
11+
DR scan 33 bits of register TM_DBG_IFULL_IN
38
TOTAL
61+ cycles
3.2 Debug Settings
Figure 2 shows an overview of the JTAG access path from a host machine to a target
PNX15xx Series system and a simplified block diagram of the PNX15xx Series
processor. The JTAG Interface Module, shown separately in the diagram, may be a
PC add-on card such as PC-1149.1/100F Boundary Scan Controller Board or a
similar module connected to a PC serial or parallel port. The JTAG interface module
is necessary for PNX15xx Series systems that are not plugged into a PC. For PC-
hosted PNX15xx Series systems, the host based TM3260 debugger front-end can
communicate with the target resident debug monitor via the PCI bus.
Host Machine
(such as a PC)
Serial or Parallel ^{May be a PC plug-in board}
Connection
JTAG Interface Module
JTAG TAP (TCK, TMS, TDI, TDO)
JTAG board
Connector
Scan Chain connecting possibly
other chips on board
JTAG
Controller
Internal System Bus
Peripherals
TM3260
I$
CPU
D$
MCU
Main
Memory
(SDRAM)
Figure 2: System with JTAG Access
Enhancements to the standard JTAG functionality include a handshake mechanism
for transferring data to and from a PNX15xx Series processor’s MMIO registers,
support for posting an interrupt, and resetting processor state.
12NC 9397 750 14321
Product data sheet
Rev. 2 — 1 December 2004
© Koninklijke Philips Electronics N.V. 2002-2003-2004. All rights reserved.
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