DF2398F20V Renesas Electronics America, DF2398F20V Datasheet - Page 139

• Manufacturer Part Number: DF2398F20V
• Description: IC H8S/2300 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398F20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• For Use With: YR0K42378FC000BA - KIT EVAL FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

6.2.2
ASTCR is an 8-bit readable/writable register that designates each area as either a 2-state access space or a 3-state access
space.
ASTCR sets the number of access states for the external memory space. The number of access states for on-chip memory
and internal I/O registers is fixed regardless of the settings in ASTCR.
ASTCR is initialized to H'FF by a power-on reset and in hardware standby mode. It is not initialized by a manual reset* or
in software standby mode.
Note: * Manual reset is only supported in the H8S/2357 ZTAT.
Bits 7 to 0—Area 7 to 0 Access State Control (AST7 to AST0): These bits select whether the corresponding area is to
be designated as a 2-state access space or a 3-state access space.
Wait state insertion is enabled or disabled at the same time.
Bit
Initial value :
R/W
Access State Control Register (ASTCR)
Bit n
ASTn
0
1
:
:
AST7
R/W
7
1
Description
Area n is designated for 2-state access
Wait state insertion in area n external space is disabled
Area n is designated for 3-state access
Wait state insertion in area n external space is enabled
AST6
R/W
6
1
AST5
R/W
5
1
AST4
R/W
4
1
AST3
R/W
3
1
AST2
R/W
2
1
AST1
R/W
Rev.6.00 Oct.28.2004 page 109 of 1016
1
1
AST0
R/W
0
1
(Initial value)
REJ09B0138-0600H
(n = 7 to 0)