mc68hc912bd32 Freescale Semiconductor, Inc, mc68hc912bd32 Datasheet - Page 208

• Manufacturer Part Number: mc68hc912bd32
• Description: 16-bit Device Composed Of Standard On-chip Peripherals
• Manufacturer: Freescale Semiconductor, Inc

TIME
CONFIGURATION
REGISTER 3 (TCR3)
Receive Interrupt
Status Register
(RISR)
TCR3
$xx04
Byteflight™ Module
MC68HC912BD32 Rev 1.0
HARDRESET
W
R
NOTE:
TWXD7*
BIT 7
0
Figure 41 Time Configuration Register 3 (TCR3)
The time configuration register 3 contains the specific programmable
time t_wx_delta for the node. Only a hard reset will clear the register.
TWXD7:TWXD0 — Time t_wx_delta
The TCR3 register can only be written if the SFTRES bit in the Module
Configuration register is set. The lower bound for TCR3 is 3.
The Receive Interrupt Status Register indicates the occurrence of
receive or SYNC pulse events, and together with the Receive Interrupt
Enable Register allows the module to operate in a polled or interrupt
driven system. Different interrupts can be generated. The Optical
Diagnosis Flag (OPTDF) is an indicator for the quality of the optical line
between two nodes. The OPTDF flag uses the internal error bit of the
optical transceiver which is driven on the Rx line when the photo stream
is below a certain level (see ELMOS E100.34 S/E module).
SYNAIF, SYNNIF, SLMMIF, XSYNIF and OPTDF are read and clear
only. RCVFIF and RXIF are read only. A flag can be cleared by writing a
1 to the corresponding bit position. Only one write is necessary to
request the clearing, i.e. the clear request is stored and executed as
soon as the condition which caused the setting is no longer valid. Writing
a 0 has no effect on the flag setting. Every flag has an associated
interrupt enable flag in the Receive Interrupt Enable Register. A hard or
soft reset will clear the register.
TWXD6*
BIT 6
These bits contain the value for the time t_wx_delta as shown in
Table
Freescale Semiconductor, Inc.
0
For More Information On This Product,
49.
TWXD5*
BIT 5
Go to: www.freescale.com
0
Table 49 Time t_wx_delta calculation
Byteflight™ Module
TWXD[7:0]
TWXD4*
BIT 4
0
t_wx_delta[ns]/25 - 1
TWXD3*
BIT 3
0
TWXD2*
BIT 2
0
TWXD1*
BIT 1
0
TWXD0*
BIT 0
0
38-sibus