dsm2180f3 STMicroelectronics, dsm2180f3 Datasheet - Page 17

• Manufacturer Part Number: dsm2180f3
• Description: Dsm Digital Signal Processor System Memory For Analog Devices Adsp-218x Family 5v Supply
• Manufacturer: STMicroelectronics

RUNTIME CONTROL REGISTER DEFINITION
There are up to 256 addresses decoded inside the
DSM device for control and status information. 27
of these locations contain registers that the DSP
can access at runtime. The base address of this
block of 256 locations is referred to in this manual
as csiop (Chip Select I/O Port). Table 4 lists the 27
registers and their offsets (in hex) from the csiop
base address needed to access individual DSM
control and status registers. The DSP will access
these registers in I/O memory space using its
Table 4. CSIOP Registers and their Offsets (in hex)
Data In
Data Out
Direction
Drive Select
Input Macrocells
Enable Out
Output Macrocells AB
Output Macrocells BC
Mask Macrocells AB
Mask Macrocells BC
Flash Sector Protect
Security Bit
JTAG Enable
PMMR0
PMMR2
Page
Register Name
Port B
0B
0D
01
05
07
09
Port C
10
12
14
16
18
1A
Port D
1B
11
13
15
17
IOMS
Other
C0
C2
C7
B0
B4
E0
20
21
22
23
MCUI/O input mode. Read to obtain current logic level of
Port pins. No writes.
MCU I/O output mode. Write to set logic level on Port
pins. Read to check status.
MCU I/O mode. Configures Port pin as input or output.
Write to set direction of Port pins.
Logic 1 = out, Logic 0 = in. Read to check status.
Write to configure Port pins as either standard CMOS or
Open Drain on some pins, while selecting high slew rate
on other pins. Read to check status.
Read to obtain state of IMCs. No writes.
Read to obtain the status of the output enable logic on
each I/O Port driver. No writes.
Read to get logic state of output of OMC bank AB.
Write to load registers of OMC bank AB.
Read to get logic state of output of OMC bank BC.
Write to load registers of OMC bank BC.
Write to set mask for loading OMCs in bank AB. A logic
1 in a bit position will block reads/writes of the
corresponding OMC. A logic 0 will pass OMC value.
Read to check status.
Write to set mask for loading OMCs in bank BC. A logic
1 in a bit position will block reads/writes of the
corresponding OMC. A logic 0 will pass OMC value.
Read to check status.
Read to determine Flash Sector Protection Setting. No
writes.
Read to determine if DSM devices Security Bit is active.
Logic 1 = device secured. No writes.
Write to enable JTAG Pins (optional feature). Read to
check status.
Power Management Register 0. Write and read.
Power Management Register 2. Write and read.
Memory Page Register. Write and read.
strobe. These registers are accesses in bytes, so
the DSP should ignore the upper byte of its 16-bit
I/O access.
Note1: All csiop registers are cleared to logic 0 at
reset.
Note2: Do not write to unused locations within the
csiop block of 256 registers. They should remain
logic zero.
Description
DSM2180F3
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