DSP56857E datasheet(41/53 Pages) FREESCALE

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Serial Communication Interface (SCI) Timing

56857 Technical Data, Rev. 6

Freescale Semiconductor

Figure 4-27 Slave Mode Clock Timing

4.11 Serial Communication Interface (SCI) Timing

Table 4-13 SCI Timing4

Operating Conditions: VSS = VSSIO = VSSA = 0 V, VDD = 1.62-1.98V, VDDIO = VDDA = 3.0–3.6V, TA = –40° to +120°C, CL ≤ 50pF, fop = 120MHz

Characteristic

Symbol

Min

Max

Unit

Baud Rate1

1. fMAX is the frequency of operation of the system clock in MHz.

—

(fMAX)/(32)

Mbps

RXD2 Pulse Width

2. The RXD pin in SCI0 is named RXD0 and the RXD pin in SCI1 is named RXD1.

RXDPW

0.965/BR

1.04/BR

TXD3 Pulse Width

3. The TXD pin in SCI0 is named TXD0 and the TXD pin in SCI1 is named TXD1.

4. Parameters listed are guaranteed by design.

TXDPW

0.965/BR

1.04/BR

tTHS

tTSS

tHS

tSS

tRFSWLS

tRFSWHS

tRFBLS

tRFSBHS

tTXHIS

tTXNVS

tFTXVS

tTXVS

tFTXES

tTXES

tTFSWLS

tTFSWHS

tTFSBLS

tTFSBHS

tSCKL

tSCKW

tSCKH

First Bit

Last Bit

SCK input

SC2 (bl) input

SC2 (wl) input

STD

SC0 input

SC1 (bl) input

SC1 (wl) input

SRD

DSP56857E Datasheet(PDF) 41 Page - Freescale Semiconductor, Inc

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