SC1200UFH-266 AMD (ADVANCED MICRO DEVICES), SC1200UFH-266 Datasheet - Page 19
SC1200UFH-266
Manufacturer Part Number
SC1200UFH-266
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.SC1200UFH-266.pdf
(443 pages)
Specifications of SC1200UFH-266
Operating Temperature (min)
0C
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / Rohs Status
Not Compliant
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Architecture Overview
AMD Geode™ SC1200/SC1201 Processor Data Book
GX_BASE+8404h-8407h
31:14
13:12
Bit
5:3
11
10
4
3
2
1
0
9
8
7
6
2
1
0
Description
RFSHTST (Test Refresh). This bit, when set high, generates a refresh request. This bit is only used for testing purposes.
XBUSARB (X-Bus Round Robin). When round robin is enabled, processor, graphics pipeline, and low priority display con-
troller requests are arbitrated at the same priority level. When disabled, processor requests are arbitrated at a higher priority
level. High priority display controller requests always have the highest arbitration priority.
0: Disable.
1: Enable round robin.
SMM_MAP (SMM Region Mapping). Maps the SMM memory region at GX_BASE+400000 to physical address A0000 to
BFFFF in SDRAM.
0: Disable.
1: Enable.
RSVD (Reserved). Write as 0.
SDRAMPRG (Program SDRAM). When this bit is set, the memory controller will program the SDRAM MRS register using
LTMODE in MC_SYNC_TIM1.
This bit must transition from zero (written to zero) to one (written to one) in order to program the SDRAM devices.
RSVD (Reserved). Write as 0.
SDCLKCTL (SDCLK High Drive/Slew Control). Controls the high drive and slew rate of SDCLK[3:0] and SDCLK_OUT.
11 is strongest, 00 is weakest.
RSVD (Reserved). Write as 0.
SDCLKOMSK# (Enable SDCLK_OUT). Turns on the output.
0: Enable.
1: Disable.
SDCLK3MSK# (Enable SDCLK3). Turns on the output.
0: Enable.
1: Disable.
SDCLK2MSK# (Enable SDCLK2). Turns on the output.
0: Enable.
1: Disable.
SDCLK1MSK# (Enable SDCLK1). Turns on the output.
0: Enable.
1: Disable.
SDCLK0MSK# (Enable SDCLK0). Turns on the output.
0: Enable.
1: Disable.
SHFTSDCLK (Shift SDCLK). This function allows shifting SDCLK to meet SDRAM setup and hold time requirements. The
shift function will not take effect until the SDCLKSTRT bit (bit 17 of MC_MEM_CNTRL1) transitions from 0 to 1:
000: No shift
001: Shift 0.5 core clock
010: Shift 1 core clock
011: Shift 1.5 core clock
RSVD (Reserved). Write as 0.
RD (Read Data Phase). Selects if read data is latched one or two core clock after the rising edge of SDCLK.
1: 2 Core clocks.
FSTRDMSK (Fast Read Mask). Do not allow core reads to bypass the request FIFO.
0: Disable.
1: Enable.
0: 1 Core clock.
Table 2-2. SC1200/SC1201 Processor Memory Controller Registers (Continued)
MC_MEM_CNTRL2 (R/W)
100: Shift 2 core clocks
101: Shift 2.5 core clocks
110: Shift 3 core clocks
111: Reserved
32579B
Reset Value: 00000801h
19
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