R5F61668RN50FPV Renesas Electronics America, R5F61668RN50FPV Datasheet - Page 1156

• Manufacturer Part Number: R5F61668RN50FPV
• Description: IC H8SX/1668 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61668RN50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 56K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• For Use With: R0K561668S000BE - KIT STARTER FOR H8SX/1668R0K561664S001BE - KIT STARTER FOR H8SX/1651HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 25 Flash Memory
(4)
FKEY is a register for software protection that enables to download the on-chip program and
perform programming/erasure of the flash memory.
Rev. 2.00 Sep. 24, 2008 Page 1122 of 1468
REJ09B0412-0200
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/erasure of
the flash memory be executed. When a value other than
H'5A is written, even if the programming/erasing
program is executed, programming/erasure cannot be
performed.
H'A5: Writing to the SCO bit is enabled. (The SCO bit
H'5A: Programming/erasure of the flash memory is
H'00: Initial value
R/W
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.)
K4
4
0
R/W
K3
3
0
R/W
K2
2
0
R/W
K1
1
0
R/W
K0
0
0