参数资料
型号: MC7457VG1000LC
厂商: Freescale Semiconductor
文件页数: 5/71页
文件大小: 0K
描述: IC MPU RISC 1000MHZ 483FCCBGA
标准包装: 36
系列: MPC74xx
处理器类型: 32-位 MPC74xx PowerPC
速度: 1.0GHz
电压: 1.3V
安装类型: 表面贴装
封装/外壳: 483-BCBGA,FCCBGA
供应商设备封装: 483-FCCBGA(29x29)
包装: 托盘
Electrical and Thermal Characteristics
MPC7457 RISC Microprocessor Hardware Specifications, Rev. 8
Freescale Semiconductor
13
Figure 2. Overshoot/Undershoot Voltage
The MPC7457 provides several I/O voltages to support both compatibility with existing systems and
migration to future systems. The MPC7457 core voltage must always be provided at nominal 1.3 V (see
Table 4 for actual recommended core voltage). Voltage to the L3 I/Os and processor interface I/Os are
provided through separate sets of supply pins and may be provided at the voltages shown in Table 3. The
input voltage threshold for each bus is selected by sampling the state of the voltage select pins at the
negation of the signal HRESET. The output voltage will swing from GND to the maximum voltage applied
to the OVDD or GVDD power pins.
Table 3. Input Threshold Voltage Setting
BVSEL Signal
Processor Bus Input Threshold
is Relative to:
L3VSEL Signal 1
L3 Bus Input Threshold is
Relative to:
Notes
0
1.8 V
0
1.8 V
2, 3
HRESET
Not Available
HRESET
1.5 V
2, 4
HRESET
2.5 V
HRESET
2.5 V
2
1
2.5 V
1
2.5 V
2
Notes:
1. Not implemented on MPC7447.
2.
Caution: The input threshold selection must agree with the OV
DD/GVDD voltages supplied. See notes in Table 2.
3. If used, pull-down resistors should be less than 250
Ω.
4. Applicable to L3 bus interface only. HRESET is the inverse of HRESET.
VIH
GND
GND – 0.3 V
GND – 0.7 V
Not to exceed 10%
OVDD/GVDD + 20%
VIL
OVDD/GVDD
OVDD/GVDD + 5%
of tSYSCLK
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