DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 181

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148BTE20; HD64F2148BTE20

6.3.2
WSCR is used to specify the data bus width for external address space access, the number of
access states, the wait mode, and the number of wait states for access to external address spaces.
The bus width and the number of access states for internal memory and internal I/O registers are
fixed regardless of the WSCR settings.
Bit
7, 6
5
4
3
2
Bit Name
—
ABW
AST
WMS1
WMS0
Wait State Control Register (WSCR)
Initial Value
All 0
1
1
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits should not be written by 1.
Bus Width Control
Selects 8 or 16 bits for access to the external address
space.
0: 16-bit access space
1: 8-bit access space
Access State Control
Selects 2 or 3 access states for access to the external
address space. This bit also enables or disables wait-
state insertion.
0: 2-state access space. Wait state insertion disabled
1: 3-state access space. Wait state insertion enabled
Wait Mode Select 1, 0
Select the wait mode for access to the external
address space when the AST bit is set to 1.
00: Program wait mode
01: Wait disabled mode
10: Pin wait mode
11: Pin auto-wait mode
in external address space access
in external address space access
Rev. 3.00 Mar 21, 2006 page 125 of 788
Section 6 Bus Controller (BSC)
REJ09B0300-0300