W925E240 Datasheet, PDF (70/73 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925E/C240
FSK Detection Interface
PARAMETER
Input Frequency Detection
Bell 202 Mark (logic 1)
Bell 202 Space (logic 0)
ITU-T V.23 Mark (logic 1)
ITU-T V.23 Space (logic 0)
Maximum Input Signal Level
SYMBOL MIN. TYP MAX. UNITS
f_Mark
f_Space
f_Mark
f_Space
1188
2178
1280.5
2068.5
1200
2200
1300
2100
1212
2222
1319.5
2131.5
-5.78
Hz
dBm
Input Sensitivity
-43
dBm
Transmission Rate
1188 1200 1212 baud
Input Noise Tolerance
SNR_TONE
20
dB
Notes:
1. Both mark and space have the same amplitude. Both mark and space are at the nominal frequencies.
2. Band limited random noise 300 - 3400 Hz. Present only when FSK signal is present.
3. These characteristics are at V_DD = 5V and temperature = 25 °C.
NOTES
+/- 1 %
+/- 1 %
+/- 1.5 %
+/- 1.5 %
1, 3
1, 2
FSK Detection
PARAMETER
CONDITION SYM. MIN. TYP^‡ MAX. UNITS NOTES
FSK Detection Enable Time
FSKE
t_FSK
25
mS
Input FSK to FCD High Delay
FCD
t_CP
Input FSK to FCD Low Delay
t_CA
8
25
mS
mS
Data Ready ACK Time
FDR
t_DR
415
416
417 US
2
Rate
Input FSK to DATA Delay
DATA
1188 1200 1212 BpS 1
t_IDD
1
5
mS
Frequency
f_DCLK 1201.6 1202.8 1204 Hz
2
High Time
DCLK
t_CH
415
416
417 US
2
Low Time
t_CL
415
416
417 US
2
DCLK to FDR Delay
DCLK, FDR t_CRD
415
416
417 US
2
Notes:
1. FSK input data rate at 1200 +/- 12 baud.
2. OSCI frequency at 3.579545 MHz +/- 0.1%.
"‡" Typical figure are at V_DD = 5V and temperature = 25 °C are design aids only, not guaranteed and not subject to production
testing.
- 70 -