参数资料
型号: STPCC0175BTI3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 75 MHz, MICROPROCESSOR, PBGA388
封装: PLASTIC, BGA-388
文件页数: 3/47页
文件大小: 747K
代理商: STPCC0175BTI3
STRAP OPTION
11/47
Issue 1.6
Notethat the SIMM speed and typeinformation read here is meant only for the software and is not used by thehard-
ware. The software must program the Host and graphics dram controller configuration registers appropriately based
on these bits.
This register defaults to the values sampled on MD[15:8] pins after reset.
2.1.3 Strap register 2 Index 4Ch (Strap2)
Bits 4-0; This register reflect the status of pins MD[20:16] respectively.They are useby the chip as follows:
Bit 4-2; Reserved.
Bit 1; This bit reflects the value sampled on MD[17] pin and controls the PCI clock output as follows:
0: PCI clock output = HCLK / 3
1: PCI clock output = HCLK / 2.
Bit 0; Reserved.
This register defaults to the values sampled on MD[20:16] pinsafter reset.
2.1.4 HCLK PLL Strap register Index 5Fh (HCLK_Strap)
Bits 5-0 of this register reflect the status of theMD[26:21] & are used as follows:
Bit 5-3 Thesepins reflect the valuesampled on M D[26:24] pinsrespectively and control theHost clock frequency
synthesizer
Bit 2- 0 Reserved
This register defaults to the values sampled on above pins after reset.
These pin must not bepulled low for normal system operation.
Strap Registers [43:27] arereserved.
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