DF2238RTF6 Renesas Electronics America, DF2238RTF6 Datasheet - Page 183

• Manufacturer Part Number: DF2238RTF6
• Description: MCU 2.2/3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2238RTF6

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 6MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 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: HD64F2238RTF6; HD64F2238RTF6

4.3
A reset has the highest exception priority.
When the RES or MRES pin goes low, all processing halts and this LSI enters the reset. A reset
initializes the internal state of the CPU and the registers of on-chip peripheral modules. The
interrupt control mode is 0 immediately after reset.
When the RES or MRES pin goes high from the low state, this LSI starts reset exception handling.
The chip can also be reset by overflow of the watchdog timer. For details see section 13,
Watchdog Timer (WDT).
4.3.1
The power-on reset and the manual reset are available as the reset.
Table 4.3 lists the reset types. When the power is supplied, select the power-on reset.
Both the power-on reset and the manual reset initialize the internal state of the CPU. The power-
on reset initializes all registers in on-chip peripheral modules. The manual reset initializes the
registers in on-chip peripheral modules except the bus controller and the I/O ports. The state of the
bus controller and the I/O ports are maintained.
At the manual reset, the on-chip peripheral modules are initialized. Thus, the ports that are used as
I/O pins for the on-chip peripheral modules are changed to the ports controlled by the DDR and
the DR.
Table 4.3
Power-on reset
Manual reset
Legend: ×:Don’t care
The power-on reset and the manual reset are also available for the reset by the watchdog timer.
To enable the MRES pin, set the MRESE bit in SYSCR to 1.
Reset
Reset
Reset Types
Reset Types
×
Low
MRES
to Enter Reset
Condition
RES
Low
High
Initialized
Initialized
CPU
Initialized
Initialized except the bus controller and the
I/O ports
Internal Peripheral Modules
Rev. 6.00 Mar. 18, 2010 Page 121 of 982
Internal State
Section 4 Exception Handling
REJ09B0054-0600