dsp56858 Freescale Semiconductor, Inc, dsp56858 Datasheet - Page 48

• Manufacturer Part Number: dsp56858
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

4.12 Serial Communication Interface (SCI) Timing
48
Operating Conditions: V
Baud Rate
RXD
TXD
1. f
2. The RXD pin in SCI0 is named RXD0 and the RXD pin in SCI1 is named RXD1.
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.
SCI receive
SCI receive
3
2
MAX
Pulse Width
Pulse Width
data pin
data pin
(Input)
(Input)
is the frequency of operation of the system clock in MHz.
RXD
TXD
1
Characteristic
SS
= V
SSIO
= V
SSA
= 0 V, V
Figure 4-31 RXD Pulse Width
Figure 4-32 TXD Pulse Width
Table 4-13 SCI Timing
DD
56858 Technical Data, Rev. 6
= 1.62-1.98V, V
Symbol
RXD
TXD
BR
RXD
TXD
PW
PW
PW
PW
DDIO
= V
DDA
0.965/BR
0.965/BR
Min
= 3.0–3.6V, T
—
4
A
= –40° to +120°C, C
(f
MAX
1.04/BR
1.04/BR
Max
)/(32)
Freescale Semiconductor
L
≤ 50pF, f
op
Mbps
= 120MHz
Unit
ns
ns