I
參數(shù)資料
型號: MPC8349EVVAJFB
廠商: Freescale Semiconductor
文件頁數(shù): 41/87頁
文件大小: 0K
描述: IC MPU POWERQUICC II 672-TBGA
標準包裝: 24
系列: MPC83xx
處理器類型: 32-位 MPC83xx PowerQUICC II Pro
速度: 533MHz
電壓: 1.2V
安裝類型: 表面貼裝
封裝/外殼: 672-LBGA
供應商設備封裝: 672-TBGA(35x35)
包裝: 托盤
配用: MPC8349E-MITX-GP-ND - KIT REFERENCE PLATFORM MPC8349E
MPC8349E-MITXE-ND - BOARD REFERENCE FOR MPC8349
MPC8349EA-MDS-PB-ND - KIT MODULAR DEV SYSTEM MPC8349E
MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
46
Freescale Semiconductor
I2C
Figure 32 provides the AC test load for the I2C.
Figure 32. I2C AC Test Load
Figure 33 shows the AC timing diagram for the I2C bus.
Figure 33. I2C Bus AC Timing Diagram
Fall time of both SDA and SCL signals5
tI2CF
__
300
ns
Setup time for STOP condition
tI2PVKH
0.6
μs
Bus free time between a STOP and START condition
tI2KHDX
1.3
μs
Noise margin at the LOW level for each connected device (including
hysteresis)
VNL
0.1
× OV
DD
—V
Noise margin at the HIGH level for each connected device (including
hysteresis)
VNH
0.2
× OV
DD
—V
Notes:
1. The symbols for timing specifications follow the pattern of t(first two letters of functional block)(signal)(state)(reference)(state) for inputs
and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tI2DVKH symbolizes I
2C timing (I2) with
respect to the time data input signals (D) reach the valid state (V) relative to the tI2C clock reference (K) going to the high (H)
state or setup time. Also, tI2SXKL symbolizes I
2C timing (I2) for the time that the data with respect to the start condition (S)
goes invalid (X) relative to the tI2C clock reference (K) going to the low (L) state or hold time. Also, tI2PVKH symbolizes I
2C
timing (I2) for the time that the data with respect to the stop condition (P) reaches the valid state (V) relative to the tI2C clock
reference (K) going to the high (H) state or setup time. For rise and fall times, the latter convention is used with the appropriate
letter: R (rise) or F (fall).
2. The device provides a hold time of at least 300 ns for the SDA signal (referred to the VIH(min) of the SCL signal) to bridge
the undefined region of the falling edge of SCL.
3. The maximum tI2DVKH must be met only if the device does not stretch the LOW period (tI2CL) of the SCL signal.
4. CB = capacitance of one bus line in pF.
5.)The device does not follow the “I2C-BUS Specifications” version 2.1 regarding the tI2CF AC parameter.
Table 43. I2C AC Electrical Specifications (continued)
Parameter
Symbol1
Min
Max
Unit
Output
Z0 = 50 Ω
OVDD/2
RL = 50 Ω
Sr
S
SDA
SCL
tI2CF
tI2SXKL
tI2CL
tI2CH
tI2DXKL
tI2DVKH
tI2SXKL
tI2SVKH
tI2KHKL
tI2PVKH
tI2CR
tI2CF
PS
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