参数资料
型号: IDT79RC32T336-150BCG
厂商: IDT, Integrated Device Technology Inc
文件页数: 3/44页
文件大小: 0K
描述: IC MPU 32BIT CORE 150MHZ 256-BGA
标准包装: 90
系列: Interprise™
处理器类型: MIPS32 32-位
速度: 150MHz
电压: 2.5V
安装类型: 表面贴装
封装/外壳: 256-LBGA
供应商设备封装: 256-CABGA(17x17)
包装: 托盘
其它名称: 79RC32T336-150BCG
11 of 44
October 4, 2005
RC32336
Boot Configuration
Boot Configuration Ve
Ve
Vector
ctor
The boot configuration vector is read into the RC32336 during cold reset. The vector defines parameters in the RC32336 that are essential to oper-
ation when cold reset is complete.
The encoding of boot configuration vector is described in Table 3, and the vector input is illustrated in Figure 4.
Signal
Name/Description
MDATA[2:0]
CPU Clock Multiplier. This field specifies the value by which the PLL multiplies the master
clock input (CLK) to obtain the processor clock frequency (PCLK).
0x0 - Multiply by 2
0x1 - 0x7 — Reserved
MDATA[3]
Endian. This bit specifies the endianness.
0x0 - little endian
0x1 - big endian
MDATA[4]
Reserved. This pin may be driven high or low during boot configuration and its state is
recorded in the Boot Configuration Vector (BCV) field of the BCV register. This reserved bit
may be used to pass boot configuration parameters to software.
MDATA[6:5]
Boot Device Width. This field specifies the width of the boot device (i.e., Device 0).
0x0 - 8-bit boot device width
0x1 - 16-bit boot device width
0x2 - 32-bit boot device width
0x3 - reserved
MDATA[7]
Reset Mode. This bit specifies the length of time the RSTN signal is driven.
0x0 - Normal reset: RSTN driven for minimum of 4096 clock cycles
0x1 - reserved
MDATA[8]
Disable Watchdog Timer. When this bit is set, the watchdog timer is disabled following a cold
reset.
0x0 - Watchdog timer is enabled
0x1 - Watchdog timer is disabled
MDATA[11:9]
PCI Mode. This bit controls the operating mode of the PCI bus interface. The initial value of the
EN bit in the PCIC register is determined by the PCI mode.
0x0 - Disabled (EN initial value is zero)
0x1 - PCI satellite mode with PCI target not ready (EN initial value is one)
0x2 - PCI satellite mode with suspended CPU execution (EN initial value is one)
0x3 - PCI host mode with external arbiter (EN initial value is zero)
0x4 - PCI host mode with internal arbiter using fixed priority arbitration algorithm
(EN initial value is zero)
0x5 - PCI host mode with internal arbiter using round robin arbitration algorithm
(EN initial value is zero)
0x6 - reserved
0x7 - reserved
MDATA[15:12]
Reserved. These pins may be driven high or low during boot configuration and their state is
recorded in the Boot Configuration Vector (BCV) field of the BCV register. These reserved bits
may be used to pass boot configuration parameters to software.
Table 3 Boot Configuration Vector Encoding
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