SAA7373 Datasheet, PDF (51/60 Pages) NXP Semiconductors – Digital servo processor and Compact Disc decoder CD7

Philips Semiconductors
Digital servo processor and Compact Disc
decoder (CD7)
Product specification
SAA7373
12 OPERATING CHARACTERISTICS (MICROCONTROLLER INTERFACE TIMING)
V_DD = 3.4 to 5.5 V; V_SS = 0 V; T_amb = −10 to +70 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
NORMAL MODE
MIN.
MAX.
LOCK-TO-DISC MODE
MIN.
MAX.
UNIT
Microcontroller interface timing (4-wire bus mode; writing to registers 0 to F; reading Q-channel subcode and
decoder status); see Figs 33 and 34; note 1
INPUTS SCL AND RAB
t_CL
input LOW time
t_CH
input HIGH time
t_r
rise time
t_f
fall time
READ MODE (C_L = 20 pF)
t_dRD
delay time RAB to SDA
valid
t_PD
propagation delay
SCL to SDA
t_dRZ
delay time RAB to SDA
high-impedance
WRITE MODE ((C_L = 20 pF)
t_suD
set-up time SDA to
SCL
note 2
t_hD
t_suCR
hold time SCL to SDA
set-up time SCL to
RAB
t_dWZ
delay time SDA
high-impedance to
RAB
480/n + 20 −
2400/n + 20 −
ns
480/n + 20 −
2400/n + 20 −
ns
−
480/n
−
480/n
ns
−
480/n
−
480/n
ns
−
50
−
50
ns
720/n − 20 960/n + 20 720/n + 20 4800/n + 20 ns
−
50
−
50
ns
20 − 720/n −
20 − 720/n −
ns
−
960/n + 20 -
4800/n + 20 ns
240/n + 20 −
1200/n + 20 −
ns
0
−
0
−
ns
Microcontroller interface timing (4-wire bus mode; servo commands); see Figs 35 and 36
INPUTS SCL AND SILD
t_L
input LOW time
t_H
input HIGH time
t_r
rise time
t_f
fall time
710
−
710
710
−
710
−
240
−
−
240
−
−
ns
−
ns
240
ns
240
ns
1998 Jul 06
51