NEC switch - Manual (Page 214)

CHAPTER 16 ELECTRICAL SPECIFICATIONS
User’s Manual U12978EJ3V0UD
214
AC Characteristics
(1) Basic operations (T
A
= −−−−40 to +85°°°°C, V
DD
= 4.0 to 5.5 V)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
When PCC = 00H (f X = 6.0 MHz) 0.333 0.333 0.333
µs
Cycle time (minimum
instruction execution time)
T CY
When PCC = 02H (f X = 6.0 MHz) 1.333 1.333 1.333
µs
TI01 input frequency f
TI
0 4.0 MHz
TI01 input high-/low-level
width
t TIH , t TIL 0.1
µs
Interrupt input high-/low-level
width
t
INTH
, t
INTL
INTP0 10
µs
RESET input low-level width t RSL 10
µs
(2) Serial interface
(a) USB function (T A = 0 to +70 °°°°C, V
DD = 4.0 to 5.5 V)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
CL = 50 pF Note 75 ns USBDM and USBDP rise time t R
CL = 350 pF Note 300 ns
CL = 50 pF Note 75 ns USBDM and USBDP fall time t F
CL = 350 pF Note 300 ns
t
R
and t
F
matching t
RFM
t
R
/t
F
80 120 %
Differential output signal
cross-over point
V CRS 1.3 2.0 V
Data transfer rate t
DRATE
When the microcontroller operates at the
system clock (f X ) of 6.0 MHz
1.5 1.5 1.5 Mbps
t UDJ1 Upon transferring the next bit
−95
0 95 ns Transmission differential
signal jitter
t
UDJ2
Upon transferring the bit following the next bit
−150
0 150 ns
Transmission EOP width t EOPT1 1.25 1.33 1.50
µs
t
EOPR1
EOP width to be eliminated 300
µs
Reception EOP width
t EOPR2 EOP width to be detected 675
µs
t URES1 USB reset width to be eliminated 2.5
µs
Reception USB reset width
t
URES2
USB reset width to be detected 5.5
µs
Note CL is the capacitance of the USBDM and USBDP output lines.