M30800SFP-BL#U5 Renesas Electronics America, M30800SFP-BL#U5 Datasheet - Page 324

• Manufacturer Part Number: M30800SFP-BL#U5
• Description: MCU 3/5V 0K,PB-FREE 100-QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/80r

Specifications of M30800SFP-BL#U5

• Core Processor: M16C/80
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 45
• Program Memory Type: ROMless
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

M
R
R
32.2 Overview of standard serial I/O mode 2 (clock asynchronized)
e
E
1
v
J
6
Figure 32.20 Peripheral unit and initial communication
1 .
0
C
In standard serial I/O mode 2, software commands, addresses and data are input and output between the
MCU 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
The TxD
After the reset is released, connections can be established at 9,600 bps when initial communications (Fig-
ure 32.20) are made with a peripheral unit. However, this 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, 57,600 or 115,200
bps by executing software commands. However, communication errors may occur because of the oscilla-
tion frequency of the main clock. If errors occur, change the main clock's oscillation frequency and the baud
rate.
After executing commands from a peripheral unit that requires time to erase and write data, as with erase
and program commands, allow a sufficient time interval or execute the read status command and check
how processing ended, before executing 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. Here following are explained initial communications with
peripheral units, how frequency is identified and software commands.
Initial communications with peripheral units
9
0 .
8 /
B
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 32.20).
*1. If the peripheral unit cannot receive "B0
0
0
0
1
(1) Transmit "00
(2) The MCU with internal flash memory outputs the "B0
A
clock.
G
8
u
7
rate generator so that "00
successfully *
interval of a minimum 15 ms. Also, the baud rate at the end of initial communications is 9,600 bps.
o r
. g
0 -
1
u
1
0
p
pin is for CMOS output. Data transfer is in 8-bit units with LSB first, 1 stop bit and parity OFF.
(1) Transfer "00
0
, 2
0
2
0
At least 15ms
transfer interval
0
5
Page 311
16
1
. Initial communications must be transmitted at a speed of 9,600 bps and a transfer
" from a peripheral unit 16 times. (The MCU with internal flash memory sets the bit
16
" 16 times
Peripheral unit
The bit rate generator setting completes (9600bps)
15 th
16th
f o
3
16
2
1st
2nd
9
" can be successfully received.)
16
" successfully, change the oscillation frequency of the main
"B0
"00
"00
"00
"00
16
16
16
16
16
"
"
"
"
"
16
" check code and initial communications end
MCU with internal
flash memory
(2) Transfer check code "B0
5
32. Standard serial I/O mode
(CLK
Reset
1
) pin "L" level.
16
"