IBM 6400 Series - Page 363

363
Abbreviations and Signal Mnemonics
STBY Standby
. . . . . . . . . . . . . . .
STK Power Stacker. . . . . . . . . . . . . . . . .
SW Switch . . . . . . . . . . . . . . . . .
SYNC Synchronize . . . . . . . . . . . . . . .
TCB Task Control Block. . . . . . . . . . . . . . . . .
TEMP Temperature . . . . . . . . . . . . . . .
TOF Top of Form (first print line). . . . . . . . . . . . . . . . .
TP Test Point. . . . . . . . . . . . . . . . . .
TTL Transistor-Transistor Logic. . . . . . . . . . . . . . . . .
TXD Transmit Data. . . . . . . . . . . . . . . . .
UART Universal Asynchronous Receiver/Transmitter. . . . . . . . . . . . . . .
UDPH Upper Drive Phase. . . . . . . . . . . . . . .
UNDEF Undefined . . . . . . . . . . . . . .
USART Universal Synchronous/Asynchronous. . . . . . . . . . . . . .
Receiver/Transmitter
V Volts
. . . . . . . . . . . . . . . . . . .
V
CC
Voltage at Collector. . . . . . . . . . . . . . . . .
V
DD
Voltage at Drain. . . . . . . . . . . . . . . . .
V
SS
Voltage at Source. . . . . . . . . . . . . . . . .
VX A special ASIC containing circuits that help the DC. . . . . . . . . . . . . . . . . .
controller operate. The letters VX do not stand for
anything; they simply designate this ASIC.
WR Write. . . . . . . . . . . . . . . . .
w/ With . . . . . . . . . . . . . . . . . . .
w/o Without . . . . . . . . . . . . . . . . .
XMT Transmit . . . . . . . . . . . . . . . .