71M6403
Electronic Trip Unit
SEPTEMBER 2006
Page: 42 of 75
©
2006 TERIDIAN Semiconductor Corporation
REV 1.0
Test Ports
TMUXOUT Pin:
One out of 16 digital or 4 analog signals can be selected to be output on the TMUXOUT pin. The function of the
multiplexer is controlled with the I/O RAM register
TMUX
(0x2000[3:0]), as shown in Table 57.
TMUX[3:0]
Mode
Function
0
analog
DGND
1 analog
IBIAS
2
analog
Reserved for production test
3 analog
VBIAS
4
digital
RTM (Real time output from CE)
5
digital
Reserved for production test
6
digital
V2_OK (Comparator 2 Output)
7
digital
INEUTRAL_OK (Comparator 3 Output)
8
digital
RXD (from Optical interface)
9 digital
MUX_SYNC
A
digital
CK_10M
B digital
CK_MPU
C
--
reserved for production test
D digital
CK38
E digital
Reserved
F digital
Reserved
Table 57:
TMUX[3:0]
Selections
Emulator Port:
The emulator port, consisting of the pins E_RST, E_TCLK and E_RXTX provides control of the MPU through an
external in-circuit emulator. The E_TBUS[3:0] pins, together with the E_ISYNC/BRKRQ add trace capability to the emulator. The
emulator port is compatible with the ADM51 emulators manufactured by Signum Systems.
The signals of the emulator port have weak pull-ups. Adding 3k
Ω
pull-up resistors on the PCB is recommended.
Real-Time Monitor:
The RTM output of the CE is available as one of the digital multiplexer options. RTM data is read from the
CE DRAM locations specified by I/O RAM registers
RTM0
,
RTM1
,
RTM2
, and
RTM3
after the rise of MUX_SYNC. The RTM can
be enabled and disabled with I/O RAM register
RTM_EN
. The RTM output is clocked by CK/4. Each RTM word is clocked out in
35 cycles and contains a leading flag bit. Figure 9 in the System Timing Section illustrates the RTM output format. RTM is low
when not in use.
electronic components distributor
