Owner's manual
Integrated Circuits Inc. aP8942A
Ver 2.0 Dec 6, 2006
15
TIMING WAVEFORMS
AC CHARACTERISTICS ( T
A
= 0 to 70℃, V
DD
= 4.5V, V
SS
= 0V, 8KHz sampling )
Symbol Parameter Min. Typ.
Max.
Unit Note
t
KD
Key trigger debounce time 16
ms 1
t
KD
Key trigger debounce time – retrigger 24
ms 1
t
STPD
STOP pulse output delay time
256
μs
t
STPW
STOP pulse width
64
ms 1
t
BD
BUSY signal output delay time
100 ns
t
BH
BUSY signal output hold time
100
ns
t
AS
Address set-up time 100
ns
t
AH
Address hold time 100
ns
t
SBTW
SBT stroke pulse width 65
μs
1
t
LEDC
LED flash frequency
3
Hz 2
Notes :
1. This parameter is inversely proportional to the sampling frequency.
2. This parameter is proportional to the sampling frequency.
S1~S8, SBT
STOP
COUT
BUSY
tBD
tBH
tSTPW
tSTPD
tKD
KEY Trigger Mode
CPU Parallel Mode
tSBTW
Addr.
S1~S
5
SBT
tAH
tAS