dsp56854 Freescale Semiconductor, Inc, dsp56854 Datasheet - Page 47

• Manufacturer Part Number: dsp56854
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Delay from SCK high to SC2 (wl) high - Slave
Delay from SC0 high to SC1 (bl) high - Slave
Delay from SC0 high to SC1 (wl) high - Slave
Delay from SCK high to SC2 (bl) low - Slave
Delay from SCK high to SC2 (wl) low - Slave
Delay from SC0 high to SC1 (bl) low - Slave
Delay from SC0 high to SC1 (wl) low - Slave
SCK high to STD enable from high impedance - Slave
SCK high to STD valid - Slave
SC2 high to STD enable from high impedance (first bit) - Slave
SC2 high to STD valid (first bit) - Slave
SCK high to STD not valid - Slave
SCK high to STD high impedance - Slave
SRD Setup time before SC0 low - Slave
SRD Hold time after SC0 low - Slave
SRD Setup time before SCK low - Slave
SRD Hold time after SCK low - Slave
Operating Conditions: V
1. Slave mode is externally generated clocks and frame syncs
2. Max clock frequency is IP_clk/4 = 60MHz / 4 = 15MHz for a 120MHz part.
3. All the timings for the ESSI are given for a non-inverted serial clock polarity (TSCKP=0 in SCR2 and RSCKP=0 in SCSR)
4. 50 percent duty cycle
5. bl = bit length; wl = word length
and a non-inverted frame sync (TFSI=0 in SCR2 and RFSI=0 in SCSR). If the polarity of the clock and/or the frame sync
have been inverted, all the timings remain valid by inverting the clock signal SCK/SC0 and/or the frame sync SC2/SC1 in
the tables and in the figures.
Table 4-12 ESSI Slave Mode
Synchronous Operation (in addition to standard external clock parameters)
SS
= V
SSIO
Parameter
= V
SSA
= 0 V, V
DD
56854 Technical Data, Rev. 6
5
5
5
5
= 1.62-1.98V, V
5
5
5
1
Switching Characteristics (Continued)
DDIO
= V
DDA
= 3.0–3.6V, T
Symbol
t
t
t
t
t
t
t
TFSWHS
RFSWHS
RFSBHS
TFSWLS
RFSWLS
t
RFSBLS
t
t
TFSBLS
t
t
t
FTXES
FTXVS
TXNVS
TXHIS
t
TXES
TXVS
t
t
t
TSS
THS
HS
Enhanced Synchronous Serial Interface (ESSI) Timing
SS
A
= –40° to +120°C, C
Min
-29
-29
-29
-29
—
-1
-1
-1
4
4
4
4
4
4
4
4
4
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
L
≤ 50pF, f
Max
29
29
29
29
29
29
29
15
15
15
15
15
15
—
—
—
—
op
= 120MHz
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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