R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 244

• Manufacturer Part Number: R5F21346CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/34Cr

Specifications of R5F21346CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 43
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 211 of 723
15.3.9
Table 15.9
Notes:
Table 15.10
Data write
Operation
Data read
Vector Read
1. For the number of clock cycles required for data read/write, refer to Table 15.10 Number of Clock
2. For the number of clock cycles required for control data write-back, refer to Table 15.8
Table 15.9 shows the Operations Following DTC Activation and Required Number of Cycles for each
operation.
Table 15.10 shows the Number of Clock Cycles Required for Data Transfers.
Data is transferred as described below, when the DTBLSj (j = 0 to 23) register = N,
(1) When N = 2n (even), two-byte transfers are performed n times.
(2) When N = 2n + 1 (odd), two-byte transfers are performed n times followed by one time of one-byte
From Tables 15.9 and 15.10, the total number of required execution cycles can be obtained by the following
formula:
Number of required execution cycles = 1 + Σ[formula A] + 2
Σ: Sum of the cycles for the number of transfer times performed by one activation source ([the number of
transfer times for which CHNE is set to 1] + 1)
(1) For N = 2n (even)
(2) For N = 2n+1 (odd)
To read data from or write data to the register that to be accessed in 16-bit units, set an even value of 2 or greater
to the DTBLSj (j = 0 to 23) register.
The DTC performs accesses in 16-bit units.
Cycles Required for Data Transfers .
Specifications of Control Data Write-Back Operation .
1
transfer.
Formula A = J + n • SK2 + n • SL2
Formula A = J + n • SK2 + 1 • SK1 + n • SL2 + 1 • SL1
J: Number of cycles required to read control data (5 cycles) + number of cycles required to write back control data
Number of DTC Execution Cycles
1-byte SK1
2-byte SK2
1-byte SL1
2-byte SL2
Transfers
Unit of
Operations Following DTC Activation and Required Number of Cycles
Number of Clock Cycles Required for Data Transfers
(During DTC Transfers)
Address
Read
Even
Internal RAM
1
1
5
Control Data
1
1
Address
Odd
2
2
Write-back
(Note 2)
(Program ROM)
Internal ROM
—
—
1
2
(Data flash)
Data Read
(Note 1)
Internal
ROM
—
—
2
4
Address
Even
(Word Access)
2
2
SFR
Data Write
2
2
(Note 1)
Address
Odd
4
4
Access)
(Byte
SFR
2
4
2
4
Internal Operation
(DTC control data area)
Address
Even
1
1
1
SFR
1
1
Address
Odd
15. DTC
2
2