7 pull-up and pull-down resistors, Table 9-9, Balls with pu/pd resistors – AMD Geode SC1201 User Manual
Page 370
370
AMD Geode™ SC1200/SC1201 Processor Data Book
Electrical Specifications
32579B
9.1.7
Pull-Up and Pull-Down Resistors
The following table lists input balls that are internally con-
nected to a pull-up (PU) or pull-down (PD) resistor. If these
balls are not used, they do not require connection to an
external PU or PD resistor.
Note:
The resistors described in this table are imple-
mented as transistors. The resistance for PUs
assumes V
IN
= V
SS
and for PDs assumes V
IN
=
V
IO
.
Table 9-9. Balls with PU/PD Resistors
Signal Name
Ball No.
PU/PD
Typ Value [
Ω]
(Note 1)
PCI
FRAME#
D8
PU
22.5K
C/BE[3:0]#
H4, F3, J2,
L1
PU
22.5K
PAR
J4
PU
22.5K
IRDY#
F2
PU
22.5K
TRDY#
F1
PU
22.5K
STOP#
G1
PU
22.5K
LOCK#
H3
PU
22.5K
DEVSEL#
E4
PU
22.5K
PERR#
H2
PU
22.5K
SERR#
H1
PU
22.5K
REQ[1:0]#
A5, B5
PU
22.5K
INTA#
D26
PU
22.5K
INTB#
C26
PU
22.5K
INTC#
C9
PU
22.5K
INTD#
AA2
PU
22.5K
Low Pin Count (LPC)
LAD[3:0]
L29, L30,
L31, M28
PU
22.5K
LDRQ
L28
PU
22.5K
SERIRQ
J31
PU
22.5K
System (Straps)
CLKSEL[3:0]
P30, D29,
AF3, B8
PD
100K
BOOT16
C8
PD
100K
TFT_PRSNT
P29
PD
100K
LPC_ROM
D6
PD
100K
FPCI_MON
A4
PD
100K
DID[1:0]
C6, C5
PD
100K
ACCESS.bus (Note 2)
AB1C
N31
PU
22.5K
AB1D
N30
PU
22.5K
AB2C
N29
PU
22.5K
AB2D
M29
PU
22.5K
Parallel Port
AFD#/DSTRB#
D22
PU
22.5K
PE
D17
PUNote 2
22.5K
PDNote 2
22.5K
SLIN#/ASTRB#
B20
PU
22.5K
STB#/WRITE#
A22
PU
22.5K
INIT#
B21
PU
22.5K
JTAG
TCK
E31
PU
22.5K
TMS
F28
PU
22.5K
TDI
F29
PU
22.5K
TRST#
E29
PU
22.5K
GPIO (Note 2)
GPIO1
D10, N30
PU
22.5K
GPIO6
D28
PU
22.5K
GPIO7
C30
PU
22.5K
GPIO8
C31
PU
22.5K
GPIO9
C28
PU
22.5K
GPIO10
B29
PU
22.5K
GPIO11
AJ8
PU
22.5K
GPIO12
N29
PU
22.5K
GPIO13
M29
PU
22.5K
GPIO14
D9
PU
22.5K
GPIO15
A8
PU
22.5K
GPIO16
V31
PU
22.5K
GPIO17
A10
PU
22.5K
GPIO18
AG1
PU
22.5K
GPIO19
C9
PU
22.5K
GPIO20
A9, N31
PU
22.5K
GPIO32
M28
PU
22.5K
GPIO33
L31
PU
22.5K
GPIO34
L30
PU
22.5K
GPIO35
L29
PU
22.5K
GPIO36
L28
PU
22.5K
GPIO37
K31
PU
22.5K
GPIO38
K28
PU
22.5K
GPIO39
J31
PU
22.5K
Power Management
PWRBTN#
AH5
PU
100K
GPWIO[2:0]
AJ6, AK5,
AH6
PU
100K
Test and Measurement
GTEST
F30
PD
22.5K
Note 1.
Accuracy is: 22.5 K
Ω resistors are within a range of 20
K
Ω to 50 KΩ. 100 KΩ resistors are within a range of 90
K
Ω to 250 KΩ.
Note 2.
Controlled by software.
Signal Name
Ball No.
PU/PD
Typ Value [
Ω]
(Note 1)