
Philips Semiconductors
PNX15xx Series
Volume 1 of 1
Chapter 24: TM3260 Debug
PNX15XX_SER_3
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 3 — 17 March 2006
24-9
and writable via JTAG. Writing 0 to TM_DBG_CTRL2.ifull via JTAG is a
‘remember’ operation i.e., TM_DBG_CTRL2.ifull retains it previous state. Writing
1 to TM_DBG_CTRL2.ifull posts a TM3260 interrupt on hardware line 49.
The TM_DBG_CTRL1.sleepless bit has no longer a function. However it still can
be read and written to by the PNX15xx Series CPU via load/store operations and
by the debugger front-end running on a host by scan in/out.
JTAG Virtual Registers
There are two virtual registers, TM_DBG_IFULL_IN and TM_DBG_OFULL_OUT:
The rst virtual register TM_DBG_IFULL_IN connects the registers
TM_DBG_CTRL2.ifull and TM_DBG_DATA_IN in series. Likewise, the virtual
register TM_DBG_OFULL_OUT connects TM_DBG_CTRL1.ofull and
TM_DBG_DATA_OUT in series.
The reason for the virtual registers is to shorten the time for scanning the
TM_DBG_DATA_IN and TM_DBG_DATA_OUT registers. Without virtual
registers, one must scan in an instruction to select TM_DBG_DATA_IN, scan in
data, scan an instruction to select TM_DBG_CTRL register and nally scan in the
control register. With virtual register, one can scan in an instruction to select
TM_DBG_IFULL_IN and then scan in both control and data bits. Similar savings
can be achieved for scan out using virtual registers.
4.1 Register Summary
Table 4: Register Summary
Offset
Symbol
Description
0x06 1000
TM_DBG_N_DATA_IN
Input register for data coming from the JTAG
0x06 1004
TM_DBG_N_DATA_OUT
Output register for data going to the JTAG
0x06 1008
TM_DBG_N_CTRL1
Control register 1 for output data
0x06 100C
TM_DBG_N_CTRL2
Control register 2 for input data
0x06 1FE0
TM_DBG_N_INT_ST
Interrupt Status Register
0x06 1FE4
TM_DBG_N_INT_EN
Interrupt Enable Register
0x06 1FE8
TM_DBG_N_INT_CLR
Interrupt Clear Register
0x06 1FEC
TM_DBG_N_INT_SET
Interrupt Set Register
0x06 1FF0
Reserved
0x06 1FF4
TM_DBG_N_POWER_DOWN
Powerdown Register
0x06 1FF8
Reserved
0x06 1FFC
Module ID
Module Identication Register