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| 型号： | MPC7410VS450NE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 11/56页 |
| 文件大小： | 0K |
| 描述： | IC MPU 32BIT 450MHZ 360-FCCLGA |
| 标准包装： | 44 |
| 系列： | MPC74xx |
| 处理器类型： | 32-位 MPC74xx PowerPC |
| 速度： | 450MHz |
| 电压： | 1.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 360-CLGA，FCCLGA |
| 供应商设备封装： | 360-FCCLGA（25x25） |
| 包装： | 托盘 |
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MPC7410 RISC Microprocessor Hardware Specifications, Rev. 6.1
Freescale Semiconductor
19
Electrical and Thermal Characteristics
The L2CLK_OUT timing diagram is shown in Figure 7.
Figure 7. L2CLK_OUT Output Timing Diagram
L2CLK_OUT output jitter
—
±150
—
±150
—
±150
ps
6
Notes:
1. L2CLK outputs are L2CLK_OUTA, L2CLK_OUTB, and L2SYNC_OUT pins. The L2CLK frequency to core
frequency settings must be chosen such that the resulting L2CLK frequency and core frequency do not exceed their
respective maximum or minimum operating frequencies. The maximum L2CLK frequency will be system
dependent. L2CLK_OUTA and L2CLK_OUTB must have equal loading.
2. The nominal duty cycle of the L2CLK is 50% measured at midpoint voltage.
3. The DLL-relock time is specified in terms of L2CLKs. The number in the table must be multiplied by the period of
L2CLK to compute the actual time duration in ns. Relock timing is guaranteed by design and characterization.
4. The L2CR[L2SL] bit should be set for L2CLK frequencies less than 150 MHz. This adds more delay to each tap of
the DLL.
5. Allowable skew between L2SYNC_OUT and L2SYNC_IN.
6. Guaranteed by design and not tested. This output jitter number represents the maximum delay of one tap forward
or one tap back from the current DLL tap as the phase comparator seeks to minimize the phase difference between
L2SYNC_IN and the internal L2CLK. This number must be comprehended in the L2 timing analysis. The input jitter
on SYSCLK affects L2CLK_OUT and the L2 address/data/control signals equally and, therefore, is already
comprehended in the AC timing and does not have to be considered in the L2 timing analysis.
Table 9. L2CLK Output AC Timing Specifications (continued)
At recommended operating conditions (see Table 3)
Parameter
Symbol
400 MHz
450 MHz
500 MHz
Unit
Notes
Min
Max
Min
Max
Min
Max
VM = Midpoint Voltage (L2O
VDD/2)
L2CLK_OUTA
L2CLK_OUTB
L2 Differential Clock Mode
L2 Single-Ended Clock Mode
L2SYNC_OUT
tL2CLK
tCHCL
L2CLK_OUTA
VM
tL2CR
tL2CF
VM
L2CLK_OUTB
VM
tL2CLK
tCHCL
L2SYNC_OUT
VM
tL2CSKW
VM
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