TC1784
Program Memory Unit (PMU)
User´s Manual
5-5
V1.1, 2011-05
PMU, V1.47
The base address of the virtual OLDA memory range is A/8FE7 0000
H
(non-
cached/cached space), the end address is A/8FE7 7FFF
H
.
5.2.3
Access Performance
Write accesses to the PMU Overlay Memory OVRAM are performed with two cycles
(because of the read-modify-write for ECC generation) for bytes, half-words and words
but in one cycle for double-words. Read accesses to the OVRAM take one cycle.
Additionally, one address select cycle is required in the PMU for read and write
accesses. Bursts (BTR2) need one (for read) or two (for write) additional cycles.
5.2.4
Overlay Memory Control Register
The OLDA function and the ECC protection of OVRAM are controlled via the Overlay
RAM Control register OVRCON. Bit protection allows independent control of OLDA and
ECC function. Write accesses to this register are permitted only in Supervisor Mode SV,
read accesses in User Mode or SV. The OVRCON register is cleared with the application
(= class 3) reset.
The SCU controls if detected ECC errors trigger an NMI trap.
The register is defined as follows:
PMU0_OVRCON
Overlay RAM Control Register
(F800 0520
H
)
Reset Value: 0000 0000
H
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
0
ECCW
r
rw
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ECC
DBE
R
0
DBE
RINT
DIS
0
0
0
ECC
GEN
DIS
PEC
CCT
R
0
0
0
0
0
0
POL
DAE
N
OLD
AEN
rwh
r
rw
r
r
r
rw
w
r
r
r
r
r
r
w
rw
Field
Bits
Type Description
OLDAEN
0
rw
Online Data Acquisition Enabled
0
B
Trap generation on write access to virtual OLDA
memory is enabled
1
B
The write trap is disabled although the OLDA
memory is virtual and not available in both, the
production device and the Emulation Device.
Содержание TC1784
Страница 1: ...User s Manual V1 1 2011 05 Microcontrollers TC1784 32 Bit Single Chip Microcontroller ...
Страница 3: ...User s Manual V1 1 2011 05 Microcontrollers TC1784 32 Bit Single Chip Microcontroller ...
Страница 950: ...TC1784 Direct Memory Access Controller DMA User s Manual 11 132 V1 1 2011 05 DMA V3 03 ...
Страница 1949: ...TC1784 General Purpose Timer Array GPTA v5 User s Manual 21 297 V1 1 2011 05 GPTA v5 V1 14 ...
Страница 2350: ...w w w i n f i n e o n c o m Published by Infineon Technologies AG Doc_Number ...