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AMD Geode™ SC1200/SC1201 Processor Data Book 69
Signal Definitions
32579B
TDO E30 O JTAG Test Data Output ---
TMS F28 I JTAG Test Mode Select. This signal has an internal weak
pull-up resistor.
---
TRST# E29 I JTAG Test Reset. This signal has an internal weak pull-up
resistor.
For normal JTAG operation, this signal should be active at
power-up.
If the JTAG interface is not being used, this signal can be
tied low.
---
3.4.19 JTAG Interface Signals (Continued)
Signal Name Ball No. Type Description Mux
3.4.20 Test and Measurement Interface Signals
Signal Name Ball No. Type Description Mux
GXCLK V30 O GX Clock. This signal is for internal testing only. For nor-
mal operation either program as FP_VDD_ON or leave
unconnected.
FP_VDD_ON+
TEST3
TEST3 V30 O Internal Test Signal. This signal is used for internal test-
ing only. For normal operation leave unconnected, unless
programmed as FP_VDD_ON.
FP_VDD_ON+
GXCLK
TEST2 AJ1 O Internal Test Signals. These signals are used for internal
testing only. For normal operation leave unconnected.
PLL5B
TEST1 AG4 O PLL6B
TEST0 AH3 O PLL2B
GTEST F30 I Global Test. This signal is used for internal testing only.
For normal operation this signal should be pulled down
with 1.5 KΩ.
---
PLL6B AG4 I/O PLL6, PLL5 and PLL2 Bypass. These signals are used
for internal testing only and requires additional test modes
to observe the PLLs. These modes are not described in
this specification. For normal operation leave uncon-
nected.
TEST1
PLL5B AJ1 I/O TEST2
PLL2B AH3 I/O TEST0
SDTEST5 D28 O Memory Internal Test Signals. These signals are used
for internal testing only. For normal operation, these sig-
nals should be programmed as one of their muxed
options.
GPIO6+
DTR2#/BOUT2+
IDE_IOR1#
SDTEST4 C31 O GPIO8+CTS2#+
IDE_DREQ1
SDTEST3 E28 O SIN2
SDTEST2 C28 O GPIO9+DCD2#+
IDE_IOW1#
SDTEST1 B29 O GPIO10+DSR2#+
IDE_IORDY1
SDTEST0 C30 O GPIO7+RTS2#+
IDE_DACK1#
TDP D30 I/O Thermal Diode Positive / Negative. These signals are for
internal testing only. For normal operation leave uncon-
nected.
---
TDN D31 I/O ---