HD6417020SVX12I Renesas Electronics America, HD6417020SVX12I Datasheet - Page 138
HD6417020SVX12I
Manufacturer Part Number
HD6417020SVX12I
Description
IC SUPERH MPU ROMLESS 100TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
Specifications of HD6417020SVX12I
Core Processor
SH-1
Core Size
32-Bit
Speed
12.5MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
32
Program Memory Type
ROMless
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
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Table 8.7
A26
0
1
The chip select signal is output only for external accesses. When accessing the on-chip ROM (area
0), on-chip peripheral modules (area 5) and on-chip RAM (area 7), the CS0, CS5, and CS7 pins
are not driven low. When accessing DRAM space (area 1), select the RAS and CAS signals with
the pin function controller.
8.3.4
The size of each area is 16 Mbytes, which can be specified with 24 address bits A23–A0 for 8-bit
spaces and 16-bit spaces alike. Bits A23 and A22, however, output externally only when the
address multiplex function is used in DRAM space (area 1); in all other cases, there is no output,
so the actually accessible area for all areas is the 4 Mbyte that can be specified with 22 bits A21–
A0. No matter what the values of A23 and A22, the same 4 Mbytes of actual space is accessed. As
illustrated in figure 8.4 (a), the A23 and A22 bit regions 00, 01, 10 and 11 are called shadows of
actual areas. Shadows are allocated in 4-Mbyte units for both 8-bit and 16-bit bus widths. When
the same addresses H'3200000, H'3600000, H'3A00000 and H'3E00000 are specified for values
A21–A0, as shown in figure 8.4 (b), the same actual space is accessed regardless of the A23 and
A22 bits.
In areas whose bus widths are switchable using the A27 address bit, the shadow of the same actual
space is allocated to both A27 = 0 spaces and A27 = 1 spaces (figure 8.4(a)). When the value of
A27 is changed, the valid AD pins switch from AD15–AD0 to AD7–AD0, but the actual space
accessed remains the same.
The spaces of on-chip ROM (area 0), DRAM (area 1), on-chip peripheral modules (area 5) and on-
chip RAM (area 7) have shadows of different sizes from those discussed above. See section 8.3.5,
Description of Areas, for details.
118 RENESAS
Shadows
Address
A25
0
1
0
1
A26–A24 Bits and Chip Select Signals
A24
0
1
0
1
0
1
0
1
Area Selected
Area 0
Area 1
Area 2
Area 3
Area 4
Area 5
Area 6
Area 7
Chip Select Pin Driven Low
CS0
CS1
CS2
CS3
CS4
CS5
CS6
CS7
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