参数资料
型号: TWR-MPC8309
厂商: Freescale Semiconductor
文件页数: 45/81页
文件大小: 0K
描述: TOWER SYSTEM MODULE MPC8309
设计资源: TWR-MPC8309 Schematic
标准包装: 1
系列: PowerQUICC II™ PRO
类型: MPU
适用于相关产品: Freescale 电源塔系统
所含物品: 板,线缆
GPIO
18 GPIO
This section describes the DC and AC electrical specifications for the GPIO of the MPC8309.
18.1
GPIO DC electrical characteristics
The following table provides the DC electrical characteristics for the MPC8309 GPIO.
Table 47. GPIO DC electrical characteristics
Characteristic
Output high voltage
Output low voltage
Output low voltage
Input high voltage
Input low voltage
Input current
Symbol
V OH
V OL
V OL
V IH
V IL
I IN
Condition
I OH = –6.0 mA
I OL = 6.0 mA
I OL = 3.2 mA
0 V ≤ V IN ≤ OV DD
Min
2.4
2.0
–0.3
Max
0.5
0.4
OV DD + 0.3
0.8
±5
Unit
V
V
V
V
V
μ A
Notes
1
1
1
1
Note:
1. This specification applies when operating from 3.3-V supply.
18.2
GPIO AC timing specifications
The following table provides the GPIO input and output AC timing specifications.
Table 48. GPIO input AC timing specifications 1
Characteristic
GPIO inputs—minimum pulse width
Symbol 2
t PIWID
Min
20
Unit
ns
Notes:
1. Input specifications are measured from the 50% level of the signal to the 50% level of the rising edge of SYS_CLK_IN.
Timings are measured at the pin.
2. GPIO inputs and outputs are asynchronous to any visible clock. GPIO outputs should be synchronized before use by any
external synchronous logic. GPIO inputs are required to be valid for at least t PIWID ns to ensure proper operation.
The following figure provides the AC test load for the GPIO.
Output
Z 0 = 50 Ω
R L = 50 Ω
OV DD /2
Figure 35. GPIO AC test load
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 3
Freescale Semiconductor
45
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