wm9714l Wolfson Microelectronics plc, wm9714l Datasheet - Page 11

• Manufacturer Part Number: wm9714l
• Description: Ac?97 Audio Codec
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
SIGNAL TIMING REQUIREMENTS
AC97 INTERFACE TIMING
w
CLOCK SPECIFICATIONS
Figure 1 Clock Specifications (50pF External Load)
1.
Note:
Test Conditions
DBVDD = 3.3V, DCVDD = 3.3V, DGND1 = DGND2 = 0V, TA = -25°C to +85°C, unless otherwise
stated.
BITCLK frequency
BITCLK period
BITCLK output jitter
BITCLK high pulse width (Note 1)
BITCLK low pulse width (Note 1)
SYNC frequency
SYNC period
SYNC high pulse width
SYNC low pulse width
Worst case duty cycle restricted to 45/55
BITCLK
SYNC
PARAMETER
t
SYNC_HIGH
t
CLK_PERIOD
t
CLK_HIGH
t
t
SYNC_PERIOD
t
t
SYMBOL
CLK_PERIOD
t
SYNC_HIGH
t
SYNC_LOW
CLK_HIGH
CLK_LOW
t
SYNC_PERIOD
t
CLK_LOW
t
SYNC_LOW
MIN
36
36
12.288
81.4
40.7
40.7
20.8
19.5
TYP
1.3
48
PP, Rev 3.2, October 2008
MAX
750
WM9714L
45
45
UNIT
MHz
kHz
ns
ps
ns
ns
µs
µs
µs
11