MC68340FE16E Datasheet, PDF (422/441 Pages) Freescale Semiconductor, Inc – Integrated Processor with DMA User’s Manual

Freescale Semiconductor, Inc.
11.10 SERIAL MODULE ELECTRICAL SPECIFICATIONS (See notes (a), (b), (c), and
(d) corresponding to part operation, GND = 0 Vdc, TA = 0 to 70°C; see numbered notes; see Figures 11-15–11-18)
3.3 V
3.3 V or
5.0 V
5.0 V
8.39 MHz 16.78 MHz 25.16 MHz
Num.
Characteristic
Symbol Min Max Min Max Min Max Unit
1 CLKOUT Cycle Time
tcyc 119.2 — 59.6 — 40 —
ns
2 Clock Rise or Fall Time
trf
— 20 — 10 — 5
ns
3² Clock Input (X1 or SCLK ) Synchronizer Setup
tCS
15 — 8, 5 —
5
—
ns
Time
4 Clock Input (X1 or SCLK ) Synchronizer Hold
Time
tCH
30 — 15 — 8
—
ns
5 TxD Data Valid from CLKOUT High
tVLD
0.5 t _cyc
Max
6 X1 Cycle Time
tX1
2.25 t _cyc
Min
7 X1 High or Low Time
tX1HL
0.55 t _cyc + 0.75(tCS + t _CH )
Min
8 SCLK High or Low Time, Asynchronous (16x)
tAHL
tcyc + t _CS + t _CH
Min
Mode
9¹ SCLK High Time, Synchronous (1x) Mode
t _SH
tcyc (Gx) + tCS (Gx) + tCH (Gx)
Min
10 SCLK Low Time, Synchronous (1x) Mode
tSL
greater of
Min
({1.5tcyc (Tx) + t _CS (Tx) + t _VLD (Tx)} +
0.5tcyc (Rx) + t _CS (Rx) + t _CH (Rx)})
or
tSH
11 TxD Data Valid from SCLK Low, Synchronous tT _{× D}
1.5tcyc (Tx) +
Max
(1x) Mode
tCS (Tx) + t _VLD (Tx)
12 RxD Setup Time to SCLK High, Synchronous
tR _{× S}
0.5tcyc (Rx) + t _CS (Rx) + t _CH (Rx)
Min
(1x) Mode
13 RxD Hold Time from SCLK High, Synchronous tR _{× H}
0.5tcyc (Rx) + t _CS (Rx) + t _CH (Rx)
Min
(1x) Mode
NOTES:
(a) The electrical specifications in this document for both the 8.39 and 16.78 MHz @ 3.3 V ±0.3 V are preliminary
and apply only to the appropriate MC68340V low voltage part.
(b) The 16.78-MHz specifications apply to the MC68340 @ 5.0 V ±5% operation.
(c) The 25.16 MHz @ 5.0 V ±5% electrical specifications are preliminary.
(d) For extended temperature parts T _A = –40 to +85°C. These specifications are preliminary.
1. Asynchronous operation numbers take into account a receiver and transmitter operating at different clock
frequencies. (Rx) refers to receiver value. (Tx) refers to transmitter value. (Gx) refers to the value that is greater,
either receiver or transmitter.
2. Specification #3 for 16.78 MHz @ 3.3 V ±0.3 V will be 8 ns.
1
CLKOUT
5
TxD
Figure 11-15. Serial Module General Timing Diagram
11-22
MC68340 USER’S MANUAL
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