M37517F8HP Datasheet, PDF (92/98 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

7517 Group
Count value
nREFD
Discharge
nD – b =
TINF • VISENS1
AD
n’ ’ D – b
=
TINF • VISENS1
AD + tRD • VISENS1
VREFC
n’C
=
TINF • (VISENS1-c)
AC + tRC • (VISENS1-c)
b’
c
VREFD
VISENS1
ISENS1
input voltage
b = ^{TINF • b’}
TINF-tRD • b’
v _{c =} REFD • b
nREFD-b
nC
=
TINF • (VISENS1-c)
AC
Charge
Fig. 85 VISENS1-Count value characteristics of current integrator
Table 30 Over current detector electrical characteristics
(VCC = AVCC = 3.3V±2%, VSS =AVSS = 0V, Ta = –20 to 85 °C, f(XIN) = 4MHz, f(XCIN) = 32MHz)
Symbol
Parameter
–
Short current detect voltage error
Conditions
Min.
Limits
Unit
Typ.
Max.
±15
mV
–
Over current detect voltage error
±15
mV
–
Wake up detect voltage
–
Short current detect time error
–
Over current detect time error
8
10
12
mV
30.5
µs
T.B.D.
–
Wake up detect time
58.6
62.5
ms
Rev.1.01 Aug 02, 2004 page 92 of 96