Renesas 7700 FAMILY User Manual page 537

GLOSSARY
This section briefly explains the terms used in this user's manual. The terms defined here apply to this
manual only.
Term
Access
Access space
Access characteristics
Baud rate
Branch
Bus control signal
Count source
Down-count
External area
External bus
External device
Internal area
Interrupt routine
LSB first
MSB first
Overflow
R e a d - m o d i f y - w r i t e
instruction
Signal required for access
to external device
Stop mode
UART
Under flow
2
Means performing read, write, or read and write.
An accessible memory space of up to 16 Mbytes.
Means whether accessible or not.
Means a transfer rate of Serial I/O.
Means moving the program's execution point (= address) to another location.
A generic name for ALE, E, BHE, R/W, RDY, HOLD, HLDA and
BYTE signals.
A signal that is counted by Timers A and B, the UARTi baud rate
register (BRGi) and Watchdog timer. That is f
f /f selected by the count source select bits and others.
512 1024
Means decreasing by 1 and counting.
An accessible area for external devices connected in the memory
expansion or microprocessor mode. It is up to 16-Mbyte external
area.
A generic name for the external address bus and the data bus.
Devices connected externally to the microcomputer. A generic
name for a memory, an I/O device and a peripheral IC.
An accessible internal area. A generic name for areas of the
internal RAM, internal ROM and the SFR.
A routine that is automatically executed when an interrupt request
is accepted. Set the start address of this routine into the interrupt
vector address.
Means a transfer data format of Serial I/O; LSB is transferred
first.
Means a transfer data format of Serial I/O; MSB is transferred
first.
A state where the up-count resultant is greater than the counter
resolution.
An instruction that reads the memory contents, modifies them
and writes back to the same address. Relevant instructions are
the ASL, ASR, CLB, DEC, INC, LSR, ROL, ROR, SEB instructions.
A generic name for bus control, address bus, and data bus signals.
A state where the oscillation circuit halts and the program execution
is stopped. By executing the STP instruction, the microcomputer
enters Stop mode.
Clock asynchronous serial I/O. When used to designate the name
of a functional block, this term also means the serial I/O which
can be switched to the cock synchronous serial I/O.
A state where the down-count resultant is greater than the counter
resolution.
7751 Group User's Manual
Meaning
_ ____ __ ____ _____
2
Relevant term
Access
Access
_____
/f , f /f , f /f ,
4 16 32 64 128
Up-count
Internal area
External area
MSB first
LSB first
Under flow
Up-count
B u s c o n t r o l
signal
Wait mode
Clock
synchronous
serial I/O.
Overflow
Down-count