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P83CL782HDH Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer P83CL782HDH
Beschreibung Low voltage 8-bit microcontrollers with UART and I2C-bus
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 70 Seiten
P83CL782HDH Datasheet, Funktion
INTEGRATED CIRCUITS
DATA SHEET
P83CL781; P83CL782
Low voltage 8-bit microcontrollers
with UART and I2C-bus
Product specification
Supersedes data of 1995 Jul 13
File under Integrated Circuits, IC20
1997 Mar 14






P83CL782HDH Datasheet, Funktion
Philips Semiconductors
Low voltage 8-bit microcontrollers with
UART and I2C-bus
6 FUNCTIONAL DIAGRAM
Product specification
P83CL781; P83CL782
handbook, full pagewidth
XTAL1
XTAL2
EA
PSEN
ALE
P83CL781
P83CL782
PORT 0
LOW ORDER
ADDRESS
AND
DATA BUS
(AD0 to AD7)
PORT 1
T2
T2EX
SCL
SDA
INT2
INT3
INT4
INT5
INT6
INT7
INT8
INT9
PORT 2
HIGH ORDER
ADDRESS
BUS
(A8 to A15)
RST
PORT 3
MBH885
VSS
VDD
RXD/data
TXD/clock
INT0
INT1
T0
T1
WR
RD
1997 Mar 14
Fig.2 Functional diagram.
6

6 Page









P83CL782HDH pdf, datenblatt
Philips Semiconductors
Low voltage 8-bit microcontrollers with
UART and I2C-bus
Product specification
P83CL781; P83CL782
9 MEMORY ORGANIZATION
The P83CL78x has a 16 kbyte Program Memory (ROM)
plus 256 bytes of Data Memory (RAM) on-chip. The device
has separate address spaces for Program and Data
Memory (see Fig.6). Using Ports P0 and P2, the
P83CL78x can address up to 128 kbytes of external
memory. The CPU generates both read (RD) and write
(WR) signals for external Data Memory accesses, and the
read strobe (PSEN) for external Program Memory.
9.1 Program memory
The P83CL78x contains 16 kbytes of internal ROM. After
reset the CPU begins execution at location 0000H.
The lower 16 kbytes of Program Memory can be
implemented in either on-chip ROM or external memory.
If the EA pin is strapped to VDD, then Program Memory
fetches from addresses 0000H through to 3FFFH are
directed to the internal ROM. Fetches from addresses
4000H through to FFFFH are directed to external ROM.
Program Counter values greater than 3FFFH are
automatically addressed to external memory regardless of
the state of the EA pin.
9.4 Addressing
The P83CL78x has five methods for addressing source
operands:
Register
Direct
Register-indirect
Immediate
Base-register plus index-register-indirect.
The first three methods can be used for addressing
destination operands. Most instructions have a
‘destination/source’ field that specifies the data type,
addressing methods and operands involved.
For operations other than MOVs, the destination operand
is also a source operand.
alfpage
7FH
9.2 Data memory
The P83CL78x contains 256 bytes of internal RAM and
34 Special Function Registers (SFRs). The memory map
(Fig.6 ) shows the internal Data Memory space divided into
the lower 128 bytes, the upper 128 bytes and the SFR
space. Internal RAM locations 0 to 127 are directly and
indirectly addressable. Internal RAM locations 128 to 255
are only indirectly addressable. The Special Function
Register locations 128 to 255 bytes are only directly
addressable.
9.3 Special Function Registers
The upper 128 bytes are the address locations of the
Special Function Registers. Figures 7 and 8 show the
Special Function Registers space. The SFRs include the
port latches, timers, peripheral control, serial I/O registers,
and so on. These registers can only be accessed by direct
addressing. There are 128 addressable locations in the
SFR address space (SFRs with addresses divisible by
eight).
30H
2FH
bit-addressable space
(bit addresses 0 to 7F)
20H
R7 1FH
R0 18H
R7 17H
R0 10H 4 banks of 8 registers
R7 0FH (R0 to R7)
R0 08H
R7 07H
R0 0 MLA560 - 1
Fig.5 The lower 128 bytes of internal RAM.
1997 Mar 14
12

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