M30245FCGP#U1 Renesas Electronics America, M30245FCGP#U1 Datasheet - Page 225

• Manufacturer Part Number: M30245FCGP#U1
• Description: IC M16C/24 MCU FLSH 128K 100LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/20r

Specifications of M30245FCGP#U1

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, SSI, UART/USART, USB
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-LQFP
• Package: 100LQFP
• Family Name: R8C
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 82
• Interface Type: USB/UART/I2C/SPI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M30245 Group
Figure 1.178. Peripheral unit and initial communication
Rev.2.00
REJ03B0005-0200
Standard serial I/O mode 2
In standard serial I/O mode 2 (clock asynchronous), software commands, addresses and data are input and output
between the MCU and peripheral units (serial programmer, etc.) using 2-wire clock-asynchronous serial I/O (UART1).
Standard serial I/O mode is entered by releasing the reset with the P6
CMOS output. Data transfer is in 8-bit units with LSB first, 1 stop bit and parity OFF.
After reset, connections can be established at 9,600 bps when initial communications are made with a peripheral unit.
This requires a main clock with a minimum 2 MHz input oscillation frequency. The baud rate can also be changed from
9,600 bps to 19,200, 38,400, or 57,600 bps by executing software commands. Communication errors may occur
because of the main clock oscillation frequency. If errors occur, change the main clock's oscillation frequency and the
baud rate.
After executing commands from a peripheral unit that require time to erase and write data, as with the erase and
program commands, allow a sufficient time interval or execute the read status command and check how the process-
ing ended before executing the next command.
Data and status registers can be read after transmitting software commands. Reading the status register can check
status of the flash memory operating state or successful completion of a program or erase operation.
Initial communications with peripheral units
After reset, the bit rate generator is adjusted to 9,600 bps to match the main clock’s oscillation frequency, by sending the
code as prescribed by the protocol for initial communications with peripheral units. Figure 1.178 shows the initial
communication with peripheral units.
(1) Transmit "00
that "00
(2) The MCU with internal flash memory outputs the “B0
Initial communications must be transmitted at a speed of 9,600 bps and a transfer interval of a minimum 15 ms. Also,
the baud rate at the end of initial communications is 9,600 bps.
Note. If the peripheral unit cannot receive "B0
(1) Transfer "00
Oct 16, 2006
16
At least 15ms
transfer interval
" can be successfully received.)
16
" from a peripheral unit 16 times. (The MCU with internal flash memory sets the bit rate generator so
16
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" 16 times
Peripheral unit
The bit rate generator setting completes (9600bps)
16th
15th
1st
2nd
16
" successfully, change the oscillation frequency of the main clock.
"B0
"00
"00
"00
"00
16
16
16
16
16
"
"
"
"
"
16
” check code and initial communications end successfully.
MCU with internal
5
(CLK1) pin at a "L" level. The TxD1 pin is set to
flash memory
(2) Transfer check code "B0
Reset
Serial I/O Mode 2
16
"