DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 691

• Manufacturer Part Number: DF61657CN35FTV
• Description: IC H8SX/1657 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61657CN35FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 35MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 768KB (768K x 8)
• Program Memory Type: FLASH
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• For Use With: 3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(4)
FKEY is a register for software protection that enables to download the on-chip program and
perform programming/erasing of the flash memory.
Bit
7
6
5
4
3
2
1
0
Bit
Bit Name
Initial Value
R/W
Flash Key Code Register (FKEY)
Bit Name
K7
K6
K5
K4
K3
K2
K1
K0
R/W
K7
7
0
Initial
Value
0
0
0
0
0
0
0
0
R/W
K6
6
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
K5
5
0
Description
Key Code
When H'A5 is written to FKEY, writing to the SCO bit in
FCCS is enabled. When a value other than H'A5 is
written, the SCO bit cannot be set to 1. Therefore, the
on-chip program cannot be downloaded to the on-chip
RAM.
Only when H'5A is written can programming/erasing of
the flash memory be executed. When a value other than
H'5A is written, even if the programming/erasing
program is executed, programming/erasing cannot be
performed.
H'A5: Writing to the SCO bit is enabled. (The SCO bit
H'5A: Programming/erasing of the flash memory is
H'00: Initial value
R/W
K4
4
0
cannot be set to 1 when FKEY is a value other
than H'A5.)
enabled. (When FKEY is a value other than
H'A5, the software protection state is entered.)
Section 18 Flash Memory (0.18-µm F-ZTAT Version)
R/W
K3
3
0
Rev. 2.00 Jun. 28, 2007 Page 665 of 864
R/W
K2
2
0
R/W
K1
1
0
REJ09B0341-0200
R/W
K0
0
0