ST72652 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST72652 Datasheet PDF : 166 Pages
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ST7265x
Data Transfer Coprocessor (Cont’d)
11.2.7 Interrupts
Interrupt Event
Event
Flag
Enable
Control
Bit
Error
ERROR ERREN
Stop
STOP STOPEN
Exit
from
Wait
Yes
Yes
Exit
from
Halt
No
No
Note: The DTC interrupt events are connected to
the same interrupt vector (see Interrupts chapter).
They generate an interrupt if the corresponding
Enable Control Bit is set and the I-bit in the CC
register is reset (RIM instruction).
Bit 0 = RUN START/STOP Control
This bit is set and cleared by software. It can only
be set while LOAD=0. It is also cleared by hard-
ware when STOP=1
0: Stop DTC
1: Start DTC
DTC STATUS REGISTER (DTCSR)
Read/Write
Reset Value: 0000 0000 (00h)
7
0
0
0
0
0
0
0 ERROR STOP
11.2.8 Register Description
DTC CONTROL REGISTER (DTCCR)
Read/Write
Reset Value: 0000 0000 (00h)
7
0
0
0
0
ERR
EN
STOP
EN
LOAD
INIT
RUN
Bit 7:5 = Reserved. Must be left at reset value.
Bit 4 = ERREN Error Interrupt Enable
This bit is set and cleared by software.
0: Error interrupt disabled
1: Error interrupt enabled
Bit 3 = STOPEN Stop Interrupt Enable
This bit is set and cleared by software.
0: Stop interrupt disabled
1: Stop interrupt enabled
Bit 2 = LOAD Load Enable
This bit is set and cleared by software. It can only
be set while RUN=0.
0: Write access to DTC RAM disabled
1: Write access DTC RAM enabled
Bit 1 = INIT Initialization
This bit is set and cleared by software.
0: Do not copy DTCPR to DTC
1: Copy the DTCPR pointer to DTC
Bit 7:2 = Reserved. Forced by hardware to 0.
Bit 1 = ERROR Error Flag
This bit is set by hardware and cleared by software
reading this register.
0: No Error event occurred
1: Error event occurred (DTC is running)
Bit 0 = STOP Stop Flag
This bit is set by hardware and cleared by software
reading this register.
0: No Stop event occurred
1: Stop event occurred (DTC terminated execution
at the current intruction)
DTC POINTER REGISTER (DTCPR)
Write Only
Reset Value: 0000 0000 (00h)
7
0
MSB
LSB
Bit 7:0 = PC[7:0] Pointer Register.
This register is written by software. It gives the ad-
dress of an entry point in the protocol software that
has previously been loaded in the DTC RAM.
Note: To start executing the function, after writing
this address, set the INIT bit.
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