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鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� MPC8349ECVVAGDB
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋佹暩(sh霉)锛� 41/87闋�
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鎻忚堪锛� IC MPU POWERQUICC II 672-TBGA
妯欐簴鍖呰锛� 24
绯诲垪锛� MPC83xx
铏曠悊鍣ㄩ鍨嬶細 32-浣� MPC83xx PowerQUICC II Pro
閫熷害锛� 400MHz
闆诲锛� 1.2V
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 672-LBGA
渚涙噳鍟嗚ō鍌欏皝瑁濓細 672-TBGA锛�35x35锛�
鍖呰锛� 鎵樼洡
閰嶇敤锛� 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
鈥�
渭s
Bus free time between a STOP and START condition
tI2KHDX
1.3
鈥�
渭s
Noise margin at the LOW level for each connected device (including
hysteresis)
VNL
0.1
脳 OV
DD
鈥擵
Noise margin at the HIGH level for each connected device (including
hysteresis)
VNH
0.2
脳 OV
DD
鈥擵
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 鈥淚2C-BUS Specifications鈥� version 2.1 regarding the tI2CF AC parameter.
Table 43. I2C AC Electrical Specifications (continued)
Parameter
Symbol1
Min
Max
Unit
Output
Z0 = 50 惟
OVDD/2
RL = 50 惟
Sr
S
SDA
SCL
tI2CF
tI2SXKL
tI2CL
tI2CH
tI2DXKL
tI2DVKH
tI2SXKL
tI2SVKH
tI2KHKL
tI2PVKH
tI2CR
tI2CF
PS
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MPC8349ECVVALDB 鍒堕€犲晢:FREESCALE 鍒堕€犲晢鍏ㄧū:Freescale Semiconductor, Inc 鍔熻兘鎻忚堪:Integrated Host Processor Hardware Specifications
MPC8349ECVVALFB 鍒堕€犲晢:FREESCALE 鍒堕€犲晢鍏ㄧū:Freescale Semiconductor, Inc 鍔熻兘鎻忚堪:Integrated Host Processor Hardware Specifications