TMS320DM355 datasheet(142/153 Pages) TI

142 / 153 page

www.ti.com

Bit0

Bit(n-1)

(n-2)

(n-3)

(n-4)

Bit0

Bit(n-1)

(n-2)

(n-3)

(n-4)

M50

M49

M45

M46

M44

M43

CLKX

FSX

M52

TMS320DM355

Digital Media System-on-Chip (DMSoC)

SPRS463 – SEPTEMBER 2007

Table 5-41. ASP as SPI Timing Requirements

CLKSTP = 10b, CLKXP = 1 (see Figure 5-44)

MASTER

NO.

UNIT

MIN

MAX

M49

tsu(DRV-CKXH)

Setup time, DR valid before CLKX high

M50

th(CKXH-DRV)

Hold time, DR valid after CLKX high

Table 5-42. ASP as SPI Switching Characteristics(1)(2)

CLKSTP = 10b, CLKXP = 1 (see Figure 5-44)

MASTER

NO.

PARAMETER

UNIT

MIN

MAX

38.5 or

M52

tc(CKX)

Cycle time, CLKX

2P(1)(3)

M43

td(CKXH-FXH)

Delay time, CLKX high to FSX high(4)

T – 1

T + 3

M44

td(FXL-CKXL)

Delay time, FSX low to CLKX low(5)

D – 2

D + 2

M45

td(CKXL-DXV)

Delay time, CLKX low to DX valid

–2

Disable time, DX high impedance following last data bit from

M46

tdis(CKXH-DXHZ)

D – 3

D + 3

CLKX high

(1)

P = (1/SYSCLK2), where SYSCLK2 is an output clock of PLLC1 (see Section 3.5) .

(2)

T = CLKX period = (1 + CLKGDV)

× P

C = CLKX low pulse width = T/2 when CLKGDV is odd or zero and = (CLKGDV/2)

× P when CLKGDV is even

D = CLKX high pulse width = T/2 when CLKGDV is odd or zero and = (CLKGDV/2 + 1)

× P when CLKGDV is even

(3)

Use which ever value is greater.

(4)

FSRP = FSXP = 1. As a SPI master, FSX is inverted to provide active-low slave-enable output.

CLKXM = FSXM = 1, CLKRM = FSRM = 0 for master ASP

(5)

FSX should be low before the rising edge of clock to enable slave devices and then begin a SPI transfer at the rising edge of the master

clock (CLKX).

Figure 5-44. ASP as SPI: CLKSTP = 10b, CLKXP = 1

142

Peripheral Information and Electrical Specifications

Submit Documentation Feedback

TMS320DM355 Datasheet(PDF) 142 Page - Texas Instruments

TMS320DM355 Datasheet(HTML) 142 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL