参数资料
型号: TMS470R1VF346BPZQ
厂商: TEXAS INSTRUMENTS INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 48 MHz, RISC MICROCONTROLLER, PQFP100
封装: PLASTIC, LQFP-100
文件页数: 30/56页
文件大小: 779K
代理商: TMS470R1VF346BPZQ
TMS470R1VF336A, TMS470R1VF346A
16/32-BIT RISC FLASH MICROCONTROLLERS
SPNS079I – OCTOBER 2002 – REVISED SEPTEMBER 2006
36
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251-1443
SPIn master mode timing parameters
SPIn master mode external timing parameters (CLOCK PHASE = 0, SPInCLK = output, SPInSIMO =
output, and SPInSOMI = input)§ (see Figure 11)
The MASTER bit (SPInCTRL2.3) is set and the CLOCK PHASE bit (SPInCTRL2.0) is cleared.
tc(ICLK) = interface clock cycle time = 1/f(ICLK)
§ For rise and fall timings, see the “switching characteristics for output timings versus load capacitance” table.
When the SPI is in Master mode, the following must be true:
For PS values from 1 to 255:
tc(SPC)M ≥ (PS +1)tc(ICLK) ≥ 100 ns, where PS is the prescale value set in the SPInCTL1.[12:5] register bits.
For PS values of 0:
tc(SPC)M = 2tc(ICLK) ≥ 100 ns.
# The active edge of the SPInCLK signal referenced is controlled by the CLOCK POLARITY bit (SPInCTRL2.1).
NO.
MIN
MAX
UNIT
1
tc(SPC)M
Cycle time, SPInCLK
100
256tc(ICLK)
ns
2#
tw(SPCH)M
Pulse duration, SPInCLK high (clock polarity = 0)
0.5tc(SPC)M – tr
0.5tc(SPC)M + 5
ns
tw(SPCL)M
Pulse duration, SPInCLK low (clock polarity = 1)
0.5tc(SPC)M – tf
0.5tc(SPC)M + 5
3#
tw(SPCL)M
Pulse duration, SPInCLK low (clock polarity = 0)
0.5tc(SPC)M – tf
0.5tc(SPC)M + 5
ns
tw(SPCH)M
Pulse duration, SPInCLK high (clock polarity = 1)
0.5tc(SPC)M – tr
0.5tc(SPC)M + 5
4#
td(SPCH-SIMO)M
Delay time, SPInCLK high to SPInSIMO valid
(clock polarity = 0)
10
ns
td(SPCL-SIMO)M
Delay time, SPInCLK low to SPInSIMO valid
(clock polarity = 1)
10
5#
tv(SPCL-SIMO)M
Valid time, SPInSIMO data valid
tc(SPC)M – 5 – tr/f
ns
6#
tsu(SOMI-SPCL)M
Setup time, SPInSOMI before SPInCLK low
(clock polarity = 0)
6
ns
tsu(SOMI-SPCH)M
Setup time, SPInSOMI before SPInCLK high
(clock polarity = 1)
6
7#
tv(SPCL-SOMI)M
Valid time, SPInSOMI data valid after SPInCLK low
(clock polarity = 0)
4
ns
tv(SPCH-SOMI)M
Valid time, SPInSOMI data valid after SPInCLK high
(clock polarity = 1)
4
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