参数资料
型号: RTPXA270C0C312
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 312 MHz, RISC PROCESSOR, PBGA356
封装: 13 X 13 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, VFBGA-356
文件页数: 88/128页
文件大小: 1560K
代理商: RTPXA270C0C312
5-12
Electrical, Mechanical, and Thermal Specification
Intel PXA270 Processor
Electrical Specifications
5.6
CLK_PIO and CLK_TOUT Specifications
CLK_PIO can be used to drive a buffered version of the PXTAL_IN oscillator input or can be used
as a clock input alternative to PXTAL_IN. Refer to Table 5-13 for CLK_PIO specifications.
A buffered and inverted version of the TXTAL_IN oscillator output is driven out on CLK_TOUT.
Refer to Table 5-14 for CLK_TOUT specifications.
Note: CLK_TOUT and CLK_PIO are only available when software sets the OSCC[PIO_EN] and
OSCC[TOUT_EN] bits.
Table 5-12. Typical External 13.000-MHz Oscillator Requirements
Symbol
Description
Min
Typical
Max
Units
Amplifier Specifications
VIH_X
Input high voltage, PXTAL_IN
0.99
1.10
1.21
V
VIL_X
Input low voltage, PXTAL_IN
–0.10
0.00
0.10
V
IIN_XP
Input leakage, PXTAL_IN
10
A
CIN_XP
Input capacitance, PXTAL_IN/PXTAL_OUT
40
50
pf
tS_XP
Stabilization time
67.8
ms
Board Specifications
RP_XP
Parasitic resistance, PXTAL_IN/PXTAL_OUT to
any node
20
M
CP_XP
Parasitic capacitance, PXTAL_IN/PXTAL_OUT,
total
5
pf
COP_XP
Parasitic shunt capacitance, PXTAL_IN to
PXTAL_OUT
0.4
pf
Table 5-13. CLK_PIO Specifications
Parameter
Specifications
Frequency
13 MHz
Frequency Accuracy (derived from 13 MHz crystal)
+/-200ppm
Symmetry/Duty Cycle variation
30/70 to 70/30% at VCC
Jitter
+/-20pS max
Load capacitance (CL)50pf max
Rise and Fall time (Tr & Tf)
15nS max with 50pF load
Table 5-14. CLK_TOUT Specifications
Parameter
Specifications
Frequency
32KHz
Frequency Accuracy (derived from 32 kHz crystal)
+/-200ppm
Symmetry/Duty Cycle variation
30/70 to 70/30% at VCC
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