M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 183

• 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

7.3 Clock synchronous serial I/O mode
Table 7.3.1 lists the performance overview in the clock synchronous serial I/O mode, and Table 7.3.2 lists
the functions of I/O pins in this mode.
Table 7.3.1 Performance overview in clock synchronous serial I/O mode
Table 7.3.2 Functions of I/O pins in clock synchronous serial I/O mode
Port P8 direction register
Internal/External clock select bit
____ ____
CTS/RTS select bit
Notes 1: The TxD
Transfer data format
Transfer rate
Transmit/Receive control
TxD
RxD
CLK
CTS
(P8
___
0
Pin name
i
, P8
i
i
i
/RTS
(P8
(P8
(P8
___
2: The RxD
4
3
2
1
)
, P8
, P8
, P8
i
7
6
5
)
)
)
When selecting internal clock
When selecting external clock
i
i
Item
pin outputs “H” level until transmission starts after UARTi’s operating mode is selected.
____
____
Serial data output
Serial data input
Transfer clock output
Transfer clock input
CTS input
RTS output
pin can be used as a programmable I/O port when performing only transmission.
3
: bit 2 at addresses 34
Functions
1
: Address 14
2
: bit 3 at addresses 30
16
7702/7703 Group User’s Manual
____ ____
____ ____
Fixed
(Dummy data is output when performing only reception.)
Port P8 direction register
Internal/External clock select bit
Internal/External clock select bit = “1”
CTS/RTS select bit
CTS/RTS select bit = “1”
16
, 3C
____
Transfer data has a length of 8 bits.
LSB first
Clock which is BRGi output’s divided by 2.
Maximum 5 Mbps (f(X
Maximum 4 Mbps (f(X
Maximum 2 Mbps (f(X
CTS function or RTS function can be selected by software.
16
7.3 Clock synchronous serial I/O mode
16
, 38
16
____
Method of selection
3
= “0”
IN
IN
IN
1
’s corresponding bit = “0”
) = 25 MHz)
) = 16 MHz)
) = 8 MHz)
Functions
2
= “0”
SERIAL I/O
7–17