參數(shù)資料
型號: XRM48L950PGET
廠商: Texas Instruments
文件頁數(shù): 50/176頁
文件大?。?/td> 0K
描述: MCU 16/32Bit FLASH 3MB 144LQFP
標(biāo)準(zhǔn)包裝: 1
系列: Hercules™ ARM® RM4x
應(yīng)用: 工業(yè)安全,醫(yī)療
核心處理器: ARM? Cortex? - R4F
程序存儲器類型: 閃存(3MB)
控制器系列: RM4
RAM 容量: 256K x 8
接口: CAN,以太網(wǎng),I²C,LIN,MibSPI,SCI,SPI,USB
輸入/輸出數(shù): 64
電源電壓: 1.14 V ~ 3.6 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
包裝: 托盤
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
其它名稱: 296-29389
SDA
SCL
t
w(SDAH)
t
w(SCLL)
t
w(SCLH)
t
w(SP)
t
h(SCLL-SDAL)
t
h(SDA-SCLL)
t
h(SCLL-SDAL)
t
su(SCLH-SDAL)
t
f(SCL)
t
c(SCL)
t
r(SCL)
t
su(SCLH-SDAH)
Stop
Start
Repeated Start
Stop
t
su(SDA-SCLH)
SPNS174A – APRIL 2012 – REVISED SEPTEMBER 2013
5.8.2
I2C I/O Timing Specifications
Table 5-17. I2C Signals (SDA and SCL) Switching Characteristics(1)
Parameter
Standard Mode
Fast Mode
Unit
MIN
MAX
MIN
MAX
tc(I2CCLK)
Cycle time, Internal Module clock for I2C,
75.2
149
75.2
149
ns
prescaled from VCLK
f(SCL)
SCL Clock frequency
0
100
0
400
kHz
tc(SCL)
Cycle time, SCL
10
2.5
s
tsu(SCLH-SDAL)
Setup time, SCL high before SDA low (for a
4.7
0.6
s
repeated START condition)
th(SCLL-SDAL)
Hold time, SCL low after SDA low (for a repeated
4
0.6
s
START condition)
tw(SCLL)
Pulse duration, SCL low
4.7
1.3
s
tw(SCLH)
Pulse duration, SCL high
4
0.6
s
tsu(SDA-SCLH)
Setup time, SDA valid before SCL high
250
100
ns
th(SDA-SCLL)
Hold time, SDA valid after SCL low (for I2C bus
0
3.45(2)
0
0.9
s
devices)
tw(SDAH)
Pulse duration, SDA high between STOP and
4.7
1.3
s
START conditions
tsu(SCLH-SDAH)
Setup time, SCL high before SDA high (for STOP
4.0
0.6
s
condition)
tw(SP)
Pulse duration, spike (must be suppressed)
0
50
ns
Cb
(3)
Capacitive load for each bus line
400
pF
(1)
The I2C pins SDA and SCL do not feature fail-safe I/O buffers. These pins could potentially draw current when the device is powered
down.
(2)
The maximum th(SDA-SCLL) for I2C bus devices has only to be met if the device does not stretch the low period (tw(SCLL)) of the SCL
signal.
(3)
Cb = The total capacitance of one bus line in pF.
Figure 5-8. I2C Timings
Copyright 2012–2013, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
143
Product Folder Links: RM48L950 RM48L750 RM48L550
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