M306N4FGTFP Renesas Electronics America, M306N4FGTFP Datasheet - Page 381
M306N4FGTFP
Manufacturer Part Number
M306N4FGTFP
Description
IC M16C MCU FLASH 100QFP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/6Nr
Datasheets
1.M30622SAFPU5.pdf
(308 pages)
2.M306N4FGGPU3.pdf
(94 pages)
3.M306N4FGGPU3.pdf
(414 pages)
Specifications of M306N4FGTFP
Core Processor
M16C/60
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, I²C, IEBus, SIO, UART/USART
Peripherals
DMA, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
10K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 26x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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M16C/6N Group (M16C/6N4)
Rev.2.40
REJ09B0009-0240
23.9 Serial Interface
23.9.1 Clock Synchronous Serial I/O Mode
23.9.1.1 Transmission/reception
23.9.1.2 Transmission
23.9.1.3 Reception
With an external clock selected, and choosing the RTS function, the output level of the RTSi pin goes to
“L” when the data-receivable status becomes ready, which informs the transmission side that the reception
has become ready. The output level of the RTSi pin goes to “H” when reception starts. So if the RTSi pin
is connected to the CTSi pin on the transmission side, the circuit can transmission and reception data
with consistent timing. With the internal clock, the RTS function has no effect.
If a low-level signal is applied to the NMI pin when the IVPCR1 bit in the TB2SC register = 1 (three-phase
output forcible cutoff by input on NMI pin enabled), pins RTS2 and CLK2 go to a high-impedance state.
When an external clock is selected, the conditions must be met while if the CKPOL bit in the UiC0
register = 0 (transmit data output at the falling edge and the receive data taken in at the rising edge of the
transfer clock), the external clock is in the high state; if the CKPOL bit = 1 (transmit data output at the
rising edge and the receive data taken in at the falling edge of the transfer clock), the external clock is in
the low state.
• The TE bit in the UiC1 register = 1 (transmission enabled)
• The TI bit in the UiC1 register = 0 (data present in UiTB register)
• If CTS function is selected, input on the CTSi pin = L
In operating the clock synchronous serial I/O, operating a transmitter generates a shift clock. Fix settings
for transmission even when using the device only for reception. Dummy data is output to the outside
from the TXDi (i = 0 to 2) pin when receiving data.
When an internal clock is selected, set the TE bit in the UiC1 register (i = 0 to 2) to 1 (transmission
enabled) and write dummy data to the UiTB register, and the shift clock will thereby be generated. When
an external clock is selected, set the TE bit to 1 and write dummy data to the UiTB register, and the shift
clock will be generated when the external clock is fed to the CLKi input pin.
When successively receiving data, if all bits of the next receive data are prepared in the UARTi receive
register while the RI bit in the UiC1 register = 1 (data present in the UiRB register), an overrun error
occurs and the OER bit in the UiRB register is set to 1 (overrun error occurred). In this case, because the
content of the UiRB register is undefined, a corrective measure must be taken by programs on the
transmit and receive sides so that the valid data before the overrun error occurred will be retransmitted.
Note that when an overrun error occurred, the IR bit in the SiRIC register does not change state.
To receive data in succession, set dummy data in the lower-order byte of the UiTB register every time
reception is made.
When an external clock is selected, the conditions must be met while if the CKPOL bit = 0, the external
clock is in the high state; if the CKPOL bit = 1, the external clock is in the low state.
• The RE bit in the UiC1 register = 1 (reception enabled)
• The TE bit in the UiC1 register = 1 (transmission enabled)
• The TI bit in the UiC1 register = 0 (data present in the UiTB register)
Apr 14, 2006
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page 357 of 376
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23. Usage Notes
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