PCA84C922 Просмотр технического описания (PDF) - Philips Electronics
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PCA84C922 Datasheet PDF : 36 Pages
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Philips Semiconductors
Microcontrollers for universal infrared
remote transmitter applications
Product specification
PCA84C922; PCA84C923
1 FEATURES
• 84CXXX CPU
• ROM, RAM, I/O and keypad configurations are device
dependent; see Table 1
• Two test inputs: T0 and T1
• 3 single-level vectored interrupt sources:
– external (T0/INT and Port 1, for keypad press
Wake-up function)
– Timer/counter (TI)
– Hardware Modulator interrupt
• 8-bit programmable timer/counter with 5-bit prescaler
• Power saving Idle and Stop modes
• Low power operation: 2 V
• Hardware Modulator
• Watchdog timer
• On-chip oscillator: 1 to 6 MHz
• Single supply voltage: 2.0 to 5.5 V
• Operating temperature: −20 to +70 °C
• Available packages: SO24, SO28, VSO56 and SDIP24.
2 GENERAL DESCRIPTION
The PCA84C922A, PCA84C922C, PCA84C923A,
PCA84C923C and PCA84C923D are members of the
PCF84CXXXA CMOS family of microcontrollers and have
been designed for use in universal infrared remote
commander applications. The term PCA84C92X is used
throughout this data sheet to refer to all devices in the
range, differences between devices are shown in Table 1
and also highlighted in the text. In addition to the common
functions of the PCF84CXXXA family of microcontrollers
the PCA84C92X also provides:
• a Hardware Modulator that generates programmable
pulse trains for driving an infrared LED
• an on-chip Coding Table specifically for the storage of
code data
• a modified interrupt architecture that will wake-up the
CPU from the Idle or Stop modes when any key is
pressed
• a Watchdog Timer to prevent CPU lock-up.
The PCA84C923D has been designed as the emulation
chip for both the PCA84C92X and the PCA84CX22 range
of microcontrollers (both ranges being pin compatible).
Table 1 The PCA84C92X range of microcontrollers
FUNCTION
PCA84C923D PCA84C923C PCA84C923A
System ROM
8 kbytes
8 kbytes
8 kbytes
System RAM
256 bytes
256 bytes
256 bytes
Coding Table ROM
16 kbytes
16 kbytes
16 kbytes
Coding Table extension up to 64 kbytes no
no
Maximum number of keys 189
117
81
I/O
36
20
16
Emulation device
PCA84C923D PCA84C923D PCA84C923D
Package
VSO56
SO28
SO24 and SDIP24
PCA84C922C PCA84C922A
8 kbytes
8 kbytes
128 bytes
128 bytes
8 kbytes
8 kbytes
no
no
117
81
20
16
PCA84C923D PCA84C923D
SO28
SO24 and SDIP24
3 ORDERING INFORMATION
TYPE
NUMBER
PCA84C922AP
PCA84C922AT
PCA84C922CT
PCA84C923AP
PCA84C923AT
PCA84C923CT
PCA84C923DT
NAME
SDIP24
SO24
SO28
SDIP24
SO24
SO28
VSO56
PACKAGE
DESCRIPTION
plastic shrink dual in-line package; 24 leads (400 mil)
plastic small outline package; 24 leads; body width 7.5 mm
plastic small outline package; 28 leads; body width 7.5 mm
plastic shrink dual in-line package; 24 leads (400 mil)
plastic small outline package; 24 leads; body width 7.5 mm
plastic small outline package; 28 leads; body width 7.5 mm
plastic very small outline package; 56 leads
1997 Oct 22
3
VERSION
SOT234-1
SOT137-1
SOT136-1
SOT234-1
SOT137-1
SOT136-1
SOT190-1
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