AM3517_12 Datasheet, PDF (185/222 Pages) Texas Instruments – ARM Microprocessors

AM3517, AM3505
www.ti.com
SPRS550D – OCTOBER 2009 – REVISED MARCH 2012
6.6.6 High-End Controller Area Network Controller (HECC) Timing
The AM3517/05 device has a High-End Controller Area Network Controller (HECC). The HECC uses
established protocol to communicate serially with other controllers in harsh environments. The HECC is
fully compliant with the Controller Area Network (CAN) protocol, version 2.0B.
Key features of the HECC include the following:
• CAN, version 2.0B compliant
• 32 RX/TX message objects
• 32 receive identifier masks
• Programmable wake-up on bus activity
• Programmable interrupt scheme
• Automatic reply to a remote request
• Automatic re-transmission in case of error or loss of arbitration
• Protection against reception of a new message
• 32-bit time stamp
• Local network time counter
• Programmable priority register for each message
• Programmable transmission and reception time-out
• HECC/SCC mode of operation
• Standard-Extended Identifier
• Self-test mode
6.6.6.1 HECC Timing Requirements
Table 6-110. Timing Requirements for HECC Receive (see Figure 6-51)
NO.
1
f_(baud)
Maximum programmable baud rate
2
t_{w(HECC_RX)}
Pulse duration, receive data bit
(1) These values are relative to H (where H = 1/(baud rate).
1.8 V, 3.3 V
MIN
MAX
H-1 ⁽¹⁾
1
H+3 ⁽¹⁾
UNIT
Mbps
ns
6.6.6.2 HECC Switching Characteristics
Table 6-111. Switching Characteristics Over Recommended Operating Conditions for HECC Transmit
(see Figure 6-51)
NO.
PARAMETER
3
f_(baud)
Maximum programmable baud rate
4
t_{w(HECC_TX)}
Pulse duration, transmit data bit
(1) These values are relative to H (where H = 1/(baud rate).
1.8 V, 3.3 V
MIN
MAX
H-1 ⁽¹⁾
1
H+3 ⁽¹⁾
UNIT
Mbps
ns
2
HECCx_RX
4
HECCx_TX
Figure 6-51. HECC Transmit/Receive Timing
Copyright © 2009–2012, Texas Instruments Incorporated
Timing Requirements and Switching Characteristics 185
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