2 mdeu reset control register (mdrcr), 3 mdeu status register (mdsr), Mdeu reset control register (mdrcr) -41 – Freescale Semiconductor MCF5480 User Manual
Page 643: Mdeu status register (mdsr) -41, P. 22-41
Message Digest Execution Unit (MDEU)
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
22-41
22.10.2 MDEU Reset Control Register (MDRCR)
This register, shown in
, allows three levels reset of just the MDEU, as defined by the three
self-clearing bits.
Figure 22-29. MDEU Reset Control Register (MDRCR)
describes MDEU reset control register fields.
22.10.3 MDEU Status Register (MDSR)
This status register, as seen in
, contains 5 bits that reflect the state of the MDEU internal
signals. The MDEU status register is read-only. Writing to this location will result in an address error being
reflected in the MDEU interrupt status register.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
RI
MI
SR
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0x2C018
Table 22-26. MDEURCR Field Descriptions
Bits
Name
Description
31-27
—
Reserved
26
RI
Reset Interrupt. Writing this bit active high causes MDEU interrupts signalling DONE and
ERROR to be reset. It further resets the state of the MDEU interrupt status register.
0 No reset
1 Reset interrupt logic
25
MI
Module initialization is nearly the same as software reset, except that the MDEU Interrupt
control register remains unchanged.
0 No reset
1 Reset most of MDEU
24
SR
Software reset is functionally equivalent to hardware reset (the RSTI pin), but only for the
MDEU. All registers and internal state are returned to their defined reset state.
0 No reset
1 Full MDEU reset
23-0
—
Reserved