Datasheet

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TMS470R1B1M
16/32-Bit RISC Flash Microcontroller
SPNS109A – SEPTEMBER 2005 – REVISED AUGUST 2006
Table 2. Terminal Functions (continued)
TERMINAL INTERNAL
CURRENT
TYPE
(1) (2)
PULLUP/ DESCRIPTION
OUTPUT
NAME NO.
PULLDOWN
(3)
WATCHDOG/REAL-TIME INTERRUPT (WD/RTI)
Analog watchdog reset. The AWD pin provides a
system reset if the WD KEY is not written in time by
the system, providing an external RC network circuit is
connected. If the user is not using AWD, TI
recommends that this pin be connected to ground or
AWD 36 3.3 V 8 mA
pulled down to ground by an external resistor.
For more details on the external RC network circuit,
see the TMS470R1x System Module Reference Guide
(literature number SPNU189).
TEST/DEBUG (T/D)
TCK 76 IPD (20 µA) Test clock. TCK controls the test hardware (JTAG).
Test data in. TDI inputs serial data to the test
3.3 V
TDI 74 8 mA IPU (20 µA) instruction register, test data register, and
programmable test address (JTAG).
Test data out. TDO outputs serial data from the test
TDO 75 8 mA IPD (20 µA) instruction register, test data register, identification
register, and programmable test address (JTAG).
Test enable. Reserved for internal use only. TI
TEST 124 IPD (20 µA) recommends that this pin be connected to ground or
pulled down to ground by an external resistor.
Serial input for controlling the state of the CPU test
TMS 17 8 mA IPU (20 µA)
access port (TAP) controller (JTAG).
Serial input for controlling the second TAP. TI
3.3 V
TMS2 16 8 mA IPU (20 µA) recommends that this pin be connected to V
CCIO
or
pulled up to V
CCIO
by an external resistor.
Test hardware reset to TAP1 and TAP2. IEEE
Standard 1149-1 (JTAG) Boundary-Scan Logic. TI
TRST 144 IPD (20 µA)
recommends that this pin be pulled down to ground by
an external resistor.
FLASH
Flash test pad 2. For proper operation, this pin must
FLTP2 132 NC NC
not be connected [no connect (NC)].
V
CCP
131 3.3-V PWR Flash external pump voltage (3.3 V)
SUPPLY VOLTAGE CORE (1.8 V)
13
31
53
V
CC
1.8-V PWR Core logic supply voltage
92
123
130
SUPPLY VOLTAGE DIGITAL I/O (3.3 V)
25
69
V
CCIO
3.3-V PWR Digital I/O supply voltage
86
137
12
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