参数资料
型号: MPC8245TZU266D
厂商: Freescale Semiconductor
文件页数: 16/68页
文件大小: 0K
描述: IC MPU 32BIT 266MHZ PPC 352-TBGA
标准包装: 24
系列: MPC82xx
处理器类型: 32-位 MPC82xx PowerQUICC II
速度: 266MHz
电压: 1.8V
安装类型: 表面贴装
封装/外壳: 352-LBGA
供应商设备封装: 352-TBGA(35x35)
包装: 托盘
MPC8245 Integrated Processor Hardware Specifications, Rev. 10
Freescale Semiconductor
23
Electrical and Thermal Characteristics
Figure 13 shows the input timing diagram for mode select signals.
Figure 13. Input Timing Diagram for Mode Select Signals
4.5.3
Output AC Timing Specification
Table 11 provides the processor bus AC timing specifications for the MPC8245 at recommended operating
conditions (see Table 2) with LVDD = 3.3 V ± 0.3 V. See Figure 11 for the input/output timing diagram
referenced to sys_logic_clk. All output timings assume a purely resistive 50-
Ω load (see Figure 14 for the
AC test load for the MPC8245). Output timings are measured at the pin; time-of-flight delays must be
added for trace lengths, vias, and connectors in the system. These specifications are for the default driver
strengths indicated in Table 4.
Table 11. Output AC Timing Specifications
Num
Characteristic
Min
Max
Unit
Notes
12a
PCI_SYNC_IN to output valid, see Figure 15
12a0
Tap 0, PCI_HOLD_DEL=00, [MCP,CKE] = 11, 66 MHz PCI (default)
6.0
ns
1, 3
12a1
Tap 1, PCI_HOLD_DEL=01, [MCP,CKE] = 10
6.5
12a2
Tap 2, PCI_HOLD_DEL=10, [MCP,CKE] = 01, 33 MHz PCI
7.0
12a3
Tap 3, PCI_HOLD_DEL=11, [MCP,CKE] = 00
7.5
12b
sys_logic_clk to output valid (memory control, address, and data signals)
4.0
ns
2
12c
sys_logic_clk to output valid (for all others)
7.0
ns
2
12d
sys_logic_clk to output valid (for I2C)
5.0
ns
2
12e
sys_logic_clk to output valid (ROM/Flash/PortX)
6.0
ns
2
13a
Output hold (PCI), see Figure 15
13a0
Tap 0, PCI_HOLD_DEL=00, [MCP,CKE] = 11, 66-MHz PCI (default)
2.0
ns
1, 3, 4
13a1
Tap 1, PCI_HOLD_DEL=01, [MCP,CKE] = 10
2.5
13a2
Tap 2, PCI_HOLD_DEL=10, [MCP,CKE] = 01, 33-MHz PCI
3.0
13a3
Tap 3, PCI_HOLD_DEL=11, [MCP,CKE] = 00
3.5
13b
Output hold (all others)
1.0
ns
2
14a
PCI_SYNC_IN to output high impedance (for PCI)
14.0
ns
1, 3
VM
VM = Midpoint Voltage (1.4 V)
11b
Mode Pins
10e
HRST_CPU/HRST_CTRL
2.0 V
0.8 V
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