
390
AMD Geode SC1200/SC1201 Processor Data Book
Electrical Specifications
Revision 7.1
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 VIN = VSS and for PDs assumes VIN =
VIO.
Table 9-9. Balls with PU/PD Resistors
Signal Name
Ball No.
PU/
PD
Typ
Value [
]
(Note 1)
EBGA
TEPBGA
PCI
FRAME#
E1
D8
PU
22.5K
C/BE[3:0]#
A8, D8,
A10, A13
H4, F3, J2,
L1
PU
22.5K
PAR
C10
J4
PU
22.5K
IRDY#
C8
F2
PU
22.5K
TRDY#
B8
F1
PU
22.5K
STOP#
D9
G1
PU
22.5K
LOCK#
C9
H3
PU
22.5K
DEVSEL#
B5
E4
PU
22.5K
PERR#
B9
H2
PU
22.5K
SERR#
A9
H1
PU
22.5K
REQ[1:0]#
E3, C1
A5, B5
PU
22.5K
INTA#
AE3
D26
PU
22.5K
INTB#
AF1
C26
PU
22.5K
INTC#
H4
C9
PU
22.5K
INTD#
B22
AA2
PU
22.5K
Low Pin Count (LPC)
LAD[3:0]
AJ10, AK10,
AL10, AJ11
L29, L30,
L31, M28
PU
22.5K
LDRQ
AL9
L28
PU
22.5K
SERIRQ
AL8
J31
PU
22.5K
System (Straps)
CLKSEL[3:0]
AL13, AK3,
B27, F3
P30, D29,
AF3, B8
PD
100K
BOOT16
G4
C8
PD
100K
TFT_PRSNT
AK13
P29
PD
100K
LPC_ROM
E4
D6
PD
100K
FPCI_MON
D3
A4
PD
100K
DID[1:0]
D2, D4
C6, C5
PD
100K
ACCESS.bus (Note 2)
AB1C
AJ13
N31
PU
22.5K
AB1D
AL12
N30
PU
22.5K
AB2C
AJ12
N29
PU
22.5K
AB2D
AL11
M29
PU
22.5K
Parallel Port
AFD#/DSTRB#
AB2
D22
PU
22.5K
PE
T3
D17
22.5K
22.5K
SLIN#/ASTRB#
W1
B20
PU
22.5K
STB#/WRITE#
AB1
A22
PU
22.5K
INIT#
Y3
B21
PU
22.5K
JTAG
TCK
AL4
E31
PU
22.5K
TMS
AJ5
F28
PU
22.5K
TDI
AK5
F29
PU
22.5K
TRST#
AK4
E29
PU
22.5K
GPIO1
H2, AL12
D10, N30
PU
22.5K
GPIO6
AH3
D28
PU
22.5K
GPIO7
AH4
C30
PU
22.5K
GPIO8
AJ2
C31
PU
22.5K
GPIO9
AG4
C28
PU
22.5K
GPIO10
AJ1
B29
PU
22.5K
GPIO11
H30
AJ8
PU
22.5K
GPIO12
AJ12
N29
PU
22.5K
GPIO13
AL11
M29
PU
22.5K
GPIO14
F1
D9
PU
22.5K
GPIO15
G3
A8
PU
22.5K
GPIO16
AL15
V31
PU
22.5K
GPIO17
J4
A10
PU
22.5K
GPIO18
A28
AG1
PU
22.5K
GPIO19
H4
C9
PU
22.5K
GPIO20
H3, AJ13
A9, N31
PU
22.5K
GPIO32
AJ11
M28
PU
22.5K
GPIO33
AL10
L31
PU
22.5K
GPIO34
AK10
L30
PU
22.5K
GPIO35
AJ10
L29
PU
22.5K
GPIO36
AL9
L28
PU
22.5K
GPIO37
AK9
K31
PU
22.5K
GPIO38
AJ9
K28
PU
22.5K
GPIO39
AL8
J31
PU
22.5K
Power Management
PWRBTN#
E29
AH5
PU
100K
GPWIO[2:0]
G29, G28,
E31
AJ6, AK5,
AH6
PU
100K
Test and Measurement
GTEST
AL5
F30
PD
22.5K
Note 1.
Accuracy is: 22.5 K
resistors are within a range of 20
K
to 50 K. 100 K resistors are within a range of 90
K
to 250 K.
Note 2.
Controlled by software.
Signal Name
Ball No.
PU/
PD
Typ
Value [
]
(Note 1)
EBGA
TEPBGA