Dual-Port TPU3 RAM (DPTRAM)
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
20-5
address of the array should be written in a single operation. Writing only one half of the register will
prevent the other half from being written.
20.3.4
MISR High (MISRH) and MISR Low Registers (MISRL)
The MISRH and MISRL together contain the 32-bit RAM signature calculated by the MISC. These
registers are read-only and should be read by the host when the MISF bit in the MCR is set.
Exiting TPU3 emulation mode results in the reset of both MISRH and MISRL.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
—
RAMDS
SRESET
0000_0000_0000_000
1
Addr
0x30 0004
Figure 20-4. RAM Array Base Address Register (RAMBAR)
Table 20-3. RAMBAR Bit Settings
Bits
Name
Description
0:11
A[8:19]
DPTRAM array base address. These bits specify the 11 high-order bits of the 24-bit base
address of the DPTRAM array. This allows the array to be placed on a 8-Kbyte boundary
anywhere in the memory map. Do not overlap the DPTRAM array memory map with other
modules on the chip.
On the MPC561/MPC563 the value 0xFFA0 must be used for DPTRAM 6 Kbyte.
12:14
—
Reserved. (Bit 12 represents A[20] in DPTRAM implementations that require it.)
15
RAMDS
RAM disabled. RAMDS is a read-only status bit. The DPTRAM array is disabled after a master
reset because the RAMBAR register may be incorrect. When the array is disabled, it will not
respond to any addresses on the IMB3. Access to the DPTRAM control register block is not
affected when the array is disabled.
RAMDS is cleared by the DPTRAM module when a base address is written to the array address
field of RAMBAR.
RAMDS = 0: DPTRAM enabled
RAMDS = 1: DPTRAM disabled
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
D31
D30
D29
D28
D27
D26
D25
D24
D23
D22
D21
D20
D19
D18
D17
D16
SRESET
0000_0000_0000_0000
Addr
0x30 0006
Figure 20-5. Multiple Input Signature Register High
(MISRH)
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...