HD6417020SVX12IV Renesas Electronics America, HD6417020SVX12IV Datasheet - Page 153
HD6417020SVX12IV
Manufacturer Part Number
HD6417020SVX12IV
Description
MCU 3/5V 0K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
Specifications of HD6417020SVX12IV
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
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
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8.4.3
The upper byte and lower byte control signals when 16-bit bus width space is being accessed can
be selected from (WRH, WRL, A0) or (WR, HBS, LBS). When the byte access select bit (BAS)
of the BCR is set to 1, the WRH, WRL, and A0 pins output WR, LBS and HBS signals. Figure
8.15 illustrates the control signal output timing in the byte write cycle.
The WRH, WRL system and the HBS, LBS system are available as byte access signals for the 16-
bit space in the address/data multiplexing space and the external memory space.
These strobe signals are assigned to pins in the manner: A0/HBS, WRH/LBS, WRL/WR, and the
BAS bit of the bus control register (BCR) is used to switch specify signal sending.
Note that the byte access signals are strobe signals dedicated to byte access to a 16-bit space and
not to be used for byte access to an 8-bit space. When making an access to an 8-bit space, use the
A0/HBS pin as A0 irrespective of the BAS bit value (0 or 1) to use the WRL/WR pin as the WR
pin, and avoid using the WRH/LBS pin.
Figure 8.15 Byte Access Control Timing For External Memory Space Access (Write Cycle)
BAS = 0
BAS = 1
Byte Access Control
WRH
WRL
HBS
LBS
WR
CK
A0
Upper byte access
T1
T2
Lower byte access
T1
T2
RENESAS 133
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