Renesas SH7041 Series, Руководство по оборудованию, Страница: 179 / 923

141
For the A mask, overwrite this register as follows:
When clearing bit to 0: read the 1 bit to clear and write 0.
When setting bit to 1: read the 0 bit to set and write 1.
Bit: 7 6 5 4 3 2 1 0
DTE7 DTE6 DTE5 DTE4 DTE3 DTE2 DTE1 DTE0
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W
*
R/W
*
R/W
*
R/W
*
R/W
*
R/W
*
R/W
*
R/W
*
Note:
*
DTER bits can only be modified by writing 1 after reading 0, or writing 0 after reading 1.
8.2.8 DTC Control/Status Register (DTCSR)
The DTCSR is a 16-bit readable/writable register that sets disable/enable for DTC activation by
software, as well as the DTC vector addresses for software activation. It also indicates the DTC
transfer status.
The DTCSR is initialized to H'0000 by power-on resets and in standby mode. Manual reset does
not initialize DTCSR.
Bit: 15 14 13 12 11 10 9 8
— — — — — NMIF AE SWDTE
Initial value: 0 0 0 0 0 0 0 0
R/W: R R R R R R/W
*
1
R/W
*
1
R/W
*
2
Bit: 7 6 5 4 3 2 1 0
Bit name: DTVEC7 DTVEC6 DTVEC5 DTVEC4 DTVEC3 DTVEC2 DTVEC1 DTVEC0
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W
*
3
R/W
*
3
R/W
*
3
R/W
*
3
R/W
*
3
R/W
*
3
R/W
*
3
R/W
*
3
*
4
Notes: * 1 For the NMIF and AE bits, only a 0 write after a 1 read is possible.
*
2 For the SWDTE bit, a 1 write is always possible, but a 0 write is possible only after a 1
is read.
*
3 For the DTVEC7–DTVEC0 bits, writes are possible only when SWDTE = 0.
* 4 Be sure to write 0 to the DTVEC0 bit.
Bits 15–11—Reserved: These bits always read as 0. The write value should always be 0.