Manual Conventions; Table 1-1 High True / Low True Signal Conventions - Motorola DSP56305 User Manual

1.3

MANUAL CONVENTIONS

The following conventions are used in this manual:
• Bits within registers are always listed from Most Significant Bit (MSB) to Least
Significant Bit (LSB).
• Bits within a register are indicated AA[n:m], n>m, when more than one bit is
involved in a description. For purposes of description, the bits are presented as if
they are contiguous within a register. However, this is not always the case. Refer
to the programming model diagrams or to the programmer's sheets to see the
exact location of bits within a register.
• When a bit is described as "set," its value is 1. When a bit is described as
"cleared," its value is 0.
• The word "assert" means that a high true (active high) signal is pulled high to
V or that a low true (active low) signal is pulled low to ground. The word
CC
"deassert" means that a high true signal is pulled low to ground or that a low true
signal is pulled high to V

Table 1-1 High True / Low True Signal Conventions

Signal/Symbol
1
PIN
PIN
PIN
PIN
Note: 1. PIN is a generic term for any pin on the chip.
2. Ground is an acceptable low voltage level. See the appropriate data sheet
for the range of acceptable low voltage levels (typically a TTL logic low).
3. V
CC
the range of acceptable high voltage levels (typically a TTL logic high).
• Pins or signals that are asserted low (made active when pulled to ground)
– In text, have an overbar: for example, RESET is asserted low.
– In code examples, have a tilde in front of their names. In the example on the
following page, line 3 refers to the SS0 pin (shown as ~SS0).
• Sets of pins or signals are indicated by the first and last pins or signals in the set,
for instance HA1–HA8.
MOTOROLA
. See Table 1-1.
CC
Logic State
True
False
True
False
is an acceptable high voltage level. See the appropriate data sheet for
DSP56305 User's Manual
DSP56305 Overview
Manual Conventions
Signal State
Asserted
Ground
Deasserted
Asserted
Deasserted
Voltage
2
3
V
CC
V
CC
Ground
1-5