908E626_12 Datasheet, PDF (11/43 Pages) Freescale Semiconductor, Inc – Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication

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 9.0 V  V_SUP  16 V, -40 C  T_J  135 C, unless otherwise noted.
Typical values noted reflect the approximate parameter mean at T_A = 25 C under nominal conditions, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
LIN PHYSICAL LAYER
Propagation Delay ⁽¹⁴⁾, ⁽¹⁵⁾
TXD LOW to LIN LOW
TXD HIGH to LIN HIGH
LIN LOW to RXD LOW
LIN HIGH to RXD HIGH
TXD Symmetry
RXD Symmetry
t _TXD-LIN-LOW
–
–
t _TXD-LIN-HIGH
–
–
t _LIN-RXD-LOW
–
4.0
t _LIN-RXD-HIGH
–
4.0
t _TXD-SYM
- 2.0
–
t _RXD-SYM
- 2.0
–
s
6.0
6.0
8.0
8.0
2.0
2.0
Output Falling Edge Slew Rate ⁽¹⁴⁾, ⁽¹⁶⁾
80% to 20%
SR_F
V/s
-1.0
- 2.0
- 3.0
Output Rising Edge Slew Rate ⁽¹⁴⁾, ⁽¹⁶⁾
20% to 80%, R_BUS > 1.0 k, C_BUS < 10 nF
SR_R
V/s
1.0
2.0
3.0
LIN Rise / Fall Slew Rate Symmetry ⁽¹⁴⁾, ⁽¹⁶⁾
SR_S
- 2.0
–
2.0
s
AUTONOMOUS WATCHDOG (AWD)
AWD Oscillator Period
AWD Period Low = 512 t _OSC
TJ < 25 °C
TJ  25 °C
t _OSC
–
40
–
s
t _AWDPH
ms
16
27
34
16
22
28
AWD Period High = 256 t _OSC
TJ < 25 °C
TJ  25 °C
t _AWDPL
8.0
8.0
13.5
11
ms
17
14
AWD Cyclic Wake-up On Time
t _AWDHPON
–
90
–
s
Notes
14. All LIN characteristics are for initial LIN slew rate selection (20 kbaud) (SRS0:SRS1= 00).
15. See Figure 4, page 12.
16. See Figure 5, page 13.
MICROCONTROLLER PARAMETRICS
Table 5. MICROCONTROLLER
For a detailed microcontroller description, refer to the MC68HC908EY16 datasheet.
Core
Module
Description
High Performance HC08 Core with a Maximum Internal Bus Frequency of 8.0 MHz
Timer
Two 16-Bit Timers with Two Channels (TIM A and TIM B)
Flash
16 k Bytes
RAM
512 Bytes
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E626
11