M30262F8GP#U7 Renesas Electronics America, M30262F8GP#U7 Datasheet - Page 228

• Manufacturer Part Number: M30262F8GP#U7
• Description: IC M16C/TINY MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/Tiny/26r

Specifications of M30262F8GP#U7

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

220
Appendix Standard Serial I/O Mode 2 (Flash Memory Version)
Appendix Standard Serial I/O Mode 2 (Flash Memory Version)
Overview of standard serial I/O mode 2 (clock asynchronized)
Figure 1.23.1. Peripheral unit and initial communication
(1) Transmit “B0
(2) Transmit “00
(3) The microcomputer with internal flash memory outputs the “B0
*1. If the peripheral unit cannot receive “B0
In standard serial I/O mode 2, software commands, addresses and data are input and output between the
microcomputer and peripheral units (serial programer, etc.) using 2-wire clock-asynchronized serial I/O
(UART1). Standard serial I/O mode 2 is engaged by releasing the reset with the P6
and P8
The TxD
After the reset is released, connections can be established at 9,600 bps when initial communications
(Figure 1.23.1) are made with a peripheral unit that requires a main clock with a minimum 2 MHz input
oscillation frequency. Baud rate can also be changed from 9,600 bps to 19,200, 38,400 or 57,600 bps by
executing software commands. However, if communication errors due to the oscillation frequency of the
main clock, change the main clock's oscillation frequency and the baud rate.
After executing commands from a peripheral unit that requires time, i.e. erase, or write (program) data,
allow sufficient time to pass or execute the read status command to check the device status, before execut-
ing the next command.
Data and status registers in memory can be read after transmitting software commands. Status, such as
the operating state of the flash memory or whether a program or erase operation ended successfully or not,
can be checked by reading the status register. The following describes the initial communications with
peripheral units, how frequency is identified, and software commands.
Initial communications with peripheral units
After the reset is released, the bit rate generator is adjusted to 9,600 bps to match the oscillation fre-
quency of the main clock, by sending the code as prescribed by the protocol for initial communications
with peripheral units (Figure 1.23.1).
MHz, the microcomputer with internal flash memory outputs the “B0
frequency is anything other than 10 or 16 MHz, the microcomputer does not output anything.
bit rate generator so that “00
tions end successfully *
transfer interval of a minimum 15 ms. Also, the baud rate at the end of initial communications is 9,600
bps.
6
(CE) pin and the CNVss pin are in “H” level).
1
pin is for CMOS output. Data transfer is in 8-bit units with LSB first, 1 stop bit and parity OFF.
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
(1) Transfer "B0
(2) Transfer "00
16
16
At least 15ms
transfer interval
” from a peripheral unit 16 times. (The microcomputer with internal flash memory sets the
” from a peripheral unit. If the oscillation frequency input by the main clock is 10 or 16
16
16
" 16 times
Peripheral unit
"
1
. Initial communications must be transmitted at a speed of 9,600 bps and a
The bit rate generator setting completes (9600bps)
15 th
16th
16
” can be successfully received.)
1st
2nd
Renesas Technology Corp.
16
” successfully, change the oscillation frequency of the main clock.
"B0
"B0
"B0
"00
"00
"00
"00
16
16
16
16
16
16
16
"
"
"
"
"
"
"
internal flash memory
Microcomputer with
16
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
” check code and initial communica-
(3) Transfer check code "B0
If the oscillation frequency input
by the main clock is 10 or 16 MHz,
the microcomputer outputs "B0
If other than 10 or 16 MHz, the
microcomputer does not output
anything.
16
Reset
” check code. If the oscillation
5
(CLK
M16C/26 Group
16
1
"
) pin “L” level
16
".