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參數(shù)資料
| 型號(hào)： | P83CL580 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Low voltage 8-bit microcontrollers with UART, I2C-bus and ADC |
| 中文描述： | 低電壓8 - UART的，位微控制器的I2C總線和ADC |
| 文件頁數(shù)： | 9/80頁 |
| 文件大?。?/td> | 366K |
| 代理商： | P83CL580 |
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1997 Mar 14
9
Philips Semiconductors
Product specification
Low voltage 8-bit microcontrollers with
UART, I
2
C-bus and ADC
P80CL580; P83CL580
P0.0 to P0.7
37 to 44
37 to 44
Port 0
: 8-bit open-drain bidirectional I/O port. As an open-drain output
port it can sink 8 LS TTL loads. Port 0 pins that have logic 1s written
to them float, and in that state will function as high impedance inputs.
Low-order addressing
: Port 0 is also the multiplexed low-order
address and data bus during access to external memory. The strong
internal pull-ups are used while emitting logic 1s within the low order
address.
Port 2
: 8-bit bidirectional I/O port with internal pull-ups.
Same characteristics as Port 4.
High-order addressing
: Port 2 emits the high-order address byte
during accesses to external memory that use 16-bit addresses
(MOVX @DPTR). In this application it uses the strong internal
pull-ups when emitting logic 1s. During accesses to external memory
that use 8-bit addresses (MOVX @Ri), Port 2 emits the contents of the
P2 Special Function Register.
External Access
. When EA is held HIGH the CPU executes out of
internal Program Memory (unless the program counter exceeds
17FFH). Holding EA LOW forces the CPU to execute out of external
memory regardless of the value of the Program Counter.
Address Latch Enable
. Output pulse for latching the low byte of the
address during access to external memory. ALE is emitted at a constant
rate of
1
6
×
f
osc
, and may be used for external timing or clocking
purposes (assuming MOVX instructions are not used).
Program Store Enable
. Output read strobe to external Program
Memory. When executing code out of external Program Memory, PSEN
is activated twice each machine cycle. However, during each access to
external Data Memory two PSEN activations are skipped.
Power supply.
Not connected.
P2.0 to P2.7
55 to 53,
49 to 45
56 to 54,
49 to 45
EA
50
51
ALE
51
52
PSEN
52
53
V
DD
n.c.
56
57
3, 9, 17, 18,
35, 36, 50
and 58
SYMBOL
PIN
DESCRIPTION
VSO56
QFP64
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