D12312SVF20V Renesas Electronics America, D12312SVF20V Datasheet - Page 735

• Manufacturer Part Number: D12312SVF20V
• Description: IC H8S/2312S MCU ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12312SVF20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

(4) Flash Key Code Register (FKEY)
FKEY is a register for software protection that enables download of on-chip program and
programming/erasing of flash memory. Before setting the SCO bit to 1 in order to download on-
chip program or executing the downloaded programming/erasing program, these processing
cannot be executed if the key code is not written.
Bits 7 to 0—Key Code (K7 to K0): Only when H'A5 is written, writing to the SCO bit is valid.
When the value other than H'A5 is written to FKEY, 1 cannot be written to the SCO bit. Therefore
downloading to the on-chip RAM cannot be executed.
Only when H'5A is written, programming/erasing can be executed. Even if the on-chip
programming/erasing program is executed, flash memory cannot be programmed or erased when
the value other than H'5A is written to FKEY.
Bits 7 to 0
K7 to K0
H'A5
H'5A
H'00
Bit
Initial value :
R/W
:
:
Description
Writing to the SCO bit is enabled (The SCO bit cannot be set by the value other
than H'A5.)
Programming/erasing is enabled (The value other than H'5A is in software
protection state.)
Initial value
R/W
K7
7
0
R/W
K6
6
0
R/W
K5
5
0
R/W
K4
4
0
Rev.7.00 Feb. 14, 2007 page 701 of 1108
R/W
K3
3
0
R/W
K2
2
0
REJ09B0089-0700
R/W
Section 17 ROM
K1
1
0
R/W
K0
0
0