參數(shù)資料
型號(hào)： P80CE559EBB
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Single-chip 8-bit microcontroller
中文描述： 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
文件頁(yè)數(shù)： 8/72頁(yè)
文件大小： 524K
代理商： P80CE559EBB
Philips Semiconductors
Preliminary specification
P83CE559/P80CE559
Single-chip 8-bit microcontroller
1996 Aug 06
8
5.
ELECTROMAGNETICS COMPATIBILITY (EMC)
IMPROVEMENTS
Primary attention was paid on the reduction of electromag– netic
emission of the microcontroller P8xCE559.
The following features effect in reducing the electromag– netic
emission and additionally improve the electromagnetic susceptibility:
Four supply voltage pins (V
DD
) and four ground pins (V
SS
) with
pairs of V
DD
and V
SS
at two adjacent pins at each side of the
package.
Separated V
DD
pins for the internal logic and the port buffers
Internal decoupling capacitance improves the EMC radiation
behavior and the EMC immunity
External capacitors are to be located as close as possible
between pins V
DD1
and V
SS1,
V
DD2
and V
SS2,
V
DD3
and V
SS3
as
well as V
DD4
and V
SS4
; ceramic chip capacitors are
recommended (100nF).
The ALE output signal (pulses at a frequency off
CLK
/6) can be
disabled under software control (bit 5 in the SFR PCON: “RFI”); if
disabled, no ALE pulse will occur. ALE pin will be pulled down
internally, switching an external address latch to a quiet state. The
MOVX instruction will still toggle ALE (external data memory is
accessed). ALE will retain its normal HIGH value during Idle Mode
and a LOW value during Power-down mode while in the “RFI”
reduction mode. Additionally during internal access (EA = 1) ALE
will toggle normally when the address exceeds the internal
program memory size. During external access (EA = 0) ALE will
always toggle normally, whether the flag “RFI” is set or not.
6.
FUNCTIONAL DESCRIPTION
6.1
The P8xCE559 is a stand–alone high–performance microcontroller
designed for use in real time applications such as instrumentation,
industrial control, medium to high–end consumer applications and
specific automotive control applications.
General
In addition to the 80C51 standard functions, the device provides a
number of dedicated hardware functions for these applications.
The P8xCE559 is a control–oriented CPU with on–chip program and
data memory. It can be extended with external program memory up
to 64 Kbytes. It can also access up to 64 Kbytes of external data
memory. For systems requiring extra capability, the P8xCE559 can
be expanded using standard memories and peripherals.
The P8xCE559 has two software selectable modes of reduced
activity for further power reduction – Idle and Power–down. The Idle
Mode freezes the CPU while allowing the RAM, timers, serial ports
and interrupt system to continue functioning. The Power–down
Mode saves the RAM contents but freezes the oscillator causing all
other chip functions to be inoperative.The Power–down Mode can
be terminated by an external Reset, by the seconds interrupt and by
any one of the two external interrupts. (see description Wake–up
from Power–down Mode).
Program Memory
64 K
DIRECT AND
INDIRECT
Internal
Data Memory
External
64 K
Internal
(EA = 1)
External
(EA = 0)
255
127
0
Special
Function
Registers
Overlapped
Space
0
External
Data Memory
49152
49151
0
INDIRECT
ONLY
0
49151
1280
(ARD = 1)
(ARD = 0)
1280 bytes
AUXILIARY
RAM
Figure 4. Memory map & address space.
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