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AMD Geode™ SC1200/SC1201 Processor Data Book 75
General Configuration Block
32579B
22 RSVD (Reserved). Must be set equal to PMR[14] (LPCSEL). The LPC_ROM strap (ball D6) determines the power-on reset
(POR) state of PMR[14] and PMR[22].
21 IOCSEL (Select I/O Commands). Selects ball functions.
Ball # 0: I/O Command Signals 1: GPIO Signals
Name Add’l Dependencies Name Add’l Dependencies
F1 / D9 IOR# PMR[2] = 0 GPIO14 PMR[2] = 1
DOCR# PMR[2] = 1 Undefined PMR[2] = 0
G3 / A8 IOW# PMR[2] = 0 GPIO15 PMR[2] = 1
DOCW# PMR[2] = 1 Undefined PMR[2] = 0
20 Reserved. Must be set to 0.
19 AB2SEL (Select ACCESS.bus 2). Selects ball functions.
Ball # 0: GPIO Signals 1: ACCESS.bus 2 Signals
Name Add’l Dependencies Name Add’l Dependencies
AJ12 / N29 GPIO12 None AB2C None
AL11 / M29 GPIO13 None AB2D None
18 SP2SEL (Select SP2 Additional Pins). Selects ball functions.
Ball # 0: GPIO, IDE Signals 1: Serial Port Signals
Name Add’l Dependencies Name Add’l Dependencies
AH3 / D28 GPIO6 PMR[8] = 0 DTR2#/BOUT2 PMR[8] = 0
IDE_IOR1# PMR[8] = 1 SDTEST5 PMR[8] = 1
AG4 / C28 GPIO9 PMR[8] = 0 DCD2# PMR[8] = 0
IDE_IOW1# PMR[8] = 1 SDTEST2 PMR[8] = 1
AJ1 / B29 GPIO10 PMR[8] = 0 DSR2# PMR[8] = 0
IDE_IORDY1 PMR[8] = 1 SDTEST1 PMR[8] = 1
H30 / AJ8 GPIO11 PMR[8] = 0 RI2# PMR[8] = 0
IRQ15 PMR[8] = 1 Undefined PMR[8] = 1
17 SP2CRSEL (Select SP2 Flow Control). Selects ball functions.
Ball # 0: GPIO, IDE Signals 1: Serial Port Signals
Name Add’l Dependencies Name Add’l Dependencies
AH4 / C30 GPIO7 PMR[8] = 0 RTS2# PMR[8] = 0
IDE_DACK1# PMR[8] = 1 SDTEST0 PMR[8] = 1
AJ2 / C31 GPIO8 PMR[8] = 0 CTS2# PMR[8] = 0
IDE_DREQ1 PMR[8] = 1 SDTEST4 PMR[8] = 1
16 SP1SEL (Select SP1 Additional Pin). Selects ball function.
Ball # 0: GPIO Signal 1: Serial Port Signal
Name Add’l Dependencies Name Add’l Dependencies
A28 / AG1 GPIO18 None DTR1#/BOUT1 None
15 VOPS (Video Output Port Select). Select VOP signals instead of TFT signals. Works in conjunction with PMR[23], see
PMR[23] for definition.
14 LPCSEL (Select LPC Bus). Selects ball functions. The LPC_ROM strap (ball D6) determines the power-on reset (POR)
state of PMR[14] and PMR[22].
Ball # 0: GPIO Signals 1: LPC Signals
Name Add’l Dependencies Name Add’l Dependencies
AJ11 / M28 GPIO32 PMR[22] = 0 LAD0 PMR[22] = 1
AL10 / L31 GPIO33 PMR[22] = 0 LAD1 PMR[22] = 1
AK10 / L30 GPIO34 PMR[22] = 0 LAD2 PMR[22] = 1
AJ10 / L29 GPIO35 PMR[22] = 0 LAD3 PMR[22] = 1
AL9 / L28 GPIO36 PMR[22] = 0 LDRQ# PMR[22] = 1
AK9 / K31 GPIO37 PMR[22] = 0 LFRAME# PMR[22] = 1
AJ9 / K28 GPIO38/IRRX2 PMR[22] = 0 LPCPD# PMR[22] = 1
AL8 / J31 GPIO39 PMR[22] = 0 SERIRQ PMR[22] = 1
13 IOCS1SEL (Select IOCS1). Selects ball functions for IOCS1# or GPIO1. Works in conjunction with PMR[23], see PMR[23]
for definition.
Table 4-2. Pin Multiplexing, Interrupt Selection, and Base Address Registers (Continued)
Bit Description