M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 201

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

7.4 Clock asynchronous serial I/O (UART) mode
Table 7.4.1 lists the performance overview in the UART mode, and Table 7.4.2 lists the functions of
I/O pins in this mode.
Table 7.4.1 Performance overview in UART mode
Table 7.4.2 Functions of I/O pins in UART mode
Port P8 direction register
Internal/External clock select bit
____ ____
CTS/RTS select bit
Notes 1: The TxD
TxD
RxD
CLK
CTS
Transfer data
format
Transfer rate
Error detection
___
i
i
i
i
/RTS
(P8
(P8
(P8
___
Pin name
2: The RxD
3: The CLK
4: The CTS
3
2
1
, P8
function (when selecting CTS function).
, P8
, P8
i
(P8
7
6
5
)
___
0
)
)
, P8
i
i
i
i
Start bit
Character bit (Transfer data)
Parity bit
Stop bit
When selecting internal clock
When selecting external clock
/RTS
pin outputs “H” level while not transmitting after selecting UARTi’s operating mode.
4
pin can be used as a programmable I/O port when performing only transmission.
pin can be used as a programmable I/O port when selecting internal clock.
___
3
)
: bit 2 at addresses 34
Item
i
____
____
Serial data output
Serial data input
BRGi’s count source
input
CTS input
RTS output
pin can be used as a input port when performing only reception and not using RTS
1
: Address 14
Functions
2
: bit 3 at addresses 30
___
16
7702/7703 Group User’s Manual
16
7.4 Clock asynchronous serial I/O (UART) mode
, 3C
____ ____
____ ____
Fixed
Port P8 direction register
Internal/External clock select bit
CTS/RTS select bit
CTS/RTS select bit = “1”
1 bit
7 bits, 8 bits, or 9 bits
0 bit or 1 bit (Odd or even can be selected.)
1 bit or 2 bits
Clock of BRGi output divided by 16
Maximum 312.5 kbps (f(X
Maximum 250 kbps (f(X
Maximum 125 kbps (f(X
4 types (Overrun, Framing, Parity, and Summing)
Presence of error can be detected only by checking error sum flag.
16
16
, 38
16
Method of selection
3
= “0”
Functions
IN
IN
) = 16 MHz)
) = 8 MHz)
IN
1
’s corresponding bit = “0”
) = 25 MHz)
2
SERIAL I/O
= “1”
7–35
___