DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 736

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, 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 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• 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: -

Section 23 ROM
23.4.3
Mode Transitions
When the mode pins are set in the reset state and a reset-start is executed, the MCU enters one of
the operating modes shown in figure 23.3. In user mode, flash memory can be read but not
programmed or erased.
Flash memory can be programmed and erased in boot mode, user program mode, and programmer
mode.
Rev. 4.00 Sep 27, 2006 page 690 of 1130
REJ09B0327-0400
Notes: Only make a transition between user mode and user program mode when the CPU is
SWE = 1
User mode with
on-chip ROM
Flash Memory Operating Modes
enabled
not accessing the flash memory.
1. MD0 = MD1 = 0, P92 = P91 = P90 = 1
2. MD0 = MD1 = 0, P92 = 0, P91 = P90 = 1
On-board programming mode
(H8S/2148 F-ZTAT A-Mask Version, H8S/2147 F-ZTAT A-Mask Version, H8S/2144 F-ZTAT A-Mask Version)
program mode
SWE = 0
User
Figure 23.3 Flash Memory Mode Transitions
MD1 = 1
RES = 0
RES = 0
Reset state
Boot mode
*
1
RES = 0
*
2
RES = 0
Programmer
mode