Module Control Register (Mdcr) - Hitachi EH-150 Applications Manual

Module control register (MDCR)

Bit
15 14
+0
Bit 15-4: Reserved
These bits are reserved. Please set "0" always.
Bit 3: Automatic Sending/Receiving enable bit (AEN)
To specify whether Automatic Sending/Receiving function is used or not.
Bit3: AEN
0 Request to disable Automatic Sending/Receiving function.
1 Request to enable Automatic Sending/Receiving function.
The confirmation of this bit control can be confirmed referring ATR bit of Module status register (MDSR) bit2.
Bit 2: Request bit to confirm existence of the module (IAV)
This bit is used when to confirm this module is alive or not. The value specified this bit is reflected to AVR bit of
Module status register(MDSR) bit3. If the set value is not reflected to AVR, some problem may be happen in this
module. If this bit programmed to set by user program, the value of this bit will not be reflected without starting
run of CPU module.
Bit2: IAV
0 Request to clear the existence response bit (AVR) of status area.
1 Request to set the existence response bit (AVR) of status area.
Bit 1: IER LED indication/Clear bit (EC1)
This bit is used to turn IER LED off. And also this bit clear IERR bit of Module status register bit1.
Bit1: EC1
0 Nothing is done.
1 Request to turn IER LED off and clear IERR bit to "0".
Bit 6 of CnESR : clear ASR table set-up error bit (ATE) to "0".
Bit 0: ERR LED indication/Clear bit (EC0)
This bit is used to turn ERR LED off. And also this bit clear ERR bit of Module status register bit0.
Bit0: EC0
0 Nothing to done.
1 Request to turn ERR LED off and clear ERR bit to "0".
Clear the following bits of CnESR.
Bit 0 : Open error bit (OE)
Bit 1 : Send timeout error bit (STE)
Bit 3 : Receive area error bit (RAE)
Bit 4 : Receive error bit (RCE)
Bit 5 : Send error bit (SNE)
13 12 11 10 9
8-7
Chapter 8 Register Structure
8 7 6 5 4
Description
Description
Description
Description
3 2 1 0
AEN IAV EC1 EC0
(Initial set)
(Initial set)
(Initial set)
(Initial set)