ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. DYNAMIC ELECTRICAL CHARACTERISTICS
All characteristics are for the analog chip only. Please refer to the 68HC908EY16 datasheet for characteristics of the
microcontroller chip. Characteristics noted under conditions 9.0V ≤ VSUP ≤ 16V, -40°C ≤ TJ ≤ 135°C, unless otherwise noted.
Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
LIN PHYSICAL LAYER
(14)
Propagation Delay (13)
,
μs
t
–
–
–
–
6.0
6.0
8.0
8.0
2.0
2.0
TXD-LIN-LOW
TXD LOW to LIN LOW
TXD HIGH to LIN HIGH
LIN LOW to RXD LOW
LIN HIGH to RXD HIGH
TXD Symmetry
tTXD-LIN-HIGH
t LIN-RXD-LOW
tLIN-RXD-HIGH
–
4.0
4.0
–
–
-2.0
-2.0
t
t
TXD-SYM
RXD-SYM
–
RXD Symmetry
(15)
Output Falling Edge Slew Rate (13)
80% to 20%
,
F
SR
V/μs
V/μs
-1.0
-2.0
-3.0
(15)
Output Rising Edge Slew Rate (13)
,
R
SR
1.0
2.0
–
3.0
2.0
20% to 80%, RBUS > 1.0kΩ, CBUS < 10nF
(15)
LIN Rise/Fall Slew Rate Symmetry (13)
AUTONOMOUS WATCHDOG (AWD)
AWD Oscillator Period
,
S
SR
-2.0
μs
t
–
40
22
–
μs
OSC
AWD Period Low = 512 tOSC
t
16
28
ms
AWDPH
AWDPL
AWD Period High = 256 tOSC
AWD Cyclic Wake-up On Time
Notes
t
8.0
–
11
90
14
–
ms
t
μs
AWDHPON
13. All LIN characteristics are for initial LIN slew rate selection (20 kbaud) (SRS0:SRS1= 00).
14. See Figure 4, page 11.
15. See Figure 5, page 12.
MICROCONTROLLER PARAMETRICS
Table 5. MICROCONTROLLER
For a detailed microcontroller description, refer to the MC68HC908EY16 datasheet.
Module
Description
Core
Timer
Flash
RAM
ADC
SPI
High Performance HC08 Core with a Maximum Internal Bus Frequency of 8.0MHz
Two 16-Bit Timers with Two Channels (TIM A and TIM B)
16K Bytes
512 Bytes
10 Bit Analog-to-Digital Converter
SPI Module
908E626
Analog Integrated Circuit Device Data
Freescale Semiconductor
10
FREESCALE [ Freescale ]
