z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 53
z16f2811
Manufacturer Part Number
z16f2811
Description
High Performance Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z16F2811.pdf
(383 pages)
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PS022006-0207
External Interface
External Interface Signals
The external interface allows seamless connection to external memory and/or peripherals.
The configurable nature of the external interface supports connection with many different
bus styles and signal formats. Bit-wise control of the address, data, and control signals
means no wasted GPIO pins. Other features of the external interface includes:
•
•
•
•
•
•
•
Table 7
address bus, an 8-bit/16-bit bidirectional data bus, and control signals (Read, Write, Chip
Selects, and Wait). It is not necessary to use all pins for proper operation of the external
interface. The external interface signals are enabled pin-by-pin using the GPIO alternate
functions. For more information on GPIO alternate functions, see
Output
Table 7. External Interface Signals Description
External Interface Signal
DATA[7:0]
DATA[15:8]
ADDR[7:0]
ADDR[15:8]
ADDR[23:16]
WR
RD
CS0
WAIT
Hardware bus controller with programmable signal polarity for chip selects.
Programmable Wait state generator.
Selectable address and data bus widths.
Six external chip selects.
ISA-compatible mode.
External program execution and Stack operations.
External WAIT pin for slow peripherals.
on page 67.
lists the external interface signals. The external interface consists of a 24-bit
P R E L I M I N A R Y
Input / Output
Input / Output
Output
Output
Output
Output
Output
Input
Direction
Output
Product Specification
General-Purpose Input/
ZNEO
External Interface
™
Z16F Series
39
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