PCD3349A(1998) View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
PCD3349A Datasheet PDF : 20 Pages
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Philips Semiconductors
8-bit microcontroller with DTMF generator
Product specification
PCD3349A
7 TIMING
Although the PCD3349A operates over a clock frequency
range from 1 to 16 MHz, fxtal = 3.58 MHz will usually be
chosen to take full advantage of the frequency generator
section.
8 RESET
In addition to the conditions given in the “PCD33xxA
Family” data sheet, all derivative registers are cleared in
the RESET state.
9 STOP MODE
Since the oscillator is switched off, the frequency
generator receives no clock. It is suggested to clear both
the HGF and LGF registers before entering Stop mode.
This will cut-off the biasing of the internal amplifiers,
considerably reducing current requirements.
10 IDLE MODE
In the Idle mode, the frequency generator remains
operative.
11 INSTRUCTION SET RESTRICTIONS
Since no serial I/O interface is provided, the serial I/O
(Input/Output) instructions are not available. ‘MOV Dx, A’
is the only applicable derivative instruction because the
derivative registers are write-only.
ROM space being restricted to 4 kbytes, SEL MB2/3 would
define non-existing Program Memory banks and should
therefore be avoided.
RAM space being restricted to 224 bytes, care should be
taken to avoid accesses to non-existing RAM locations.
12 SUMMARY OF MASK OPTIONS
Table 7 Port mask options
PORT NAME
Port 0 (P0.0 to P0.7)
Port 1 (P1.0 to P1.7)
Port 2 (P2.0 to P2.7)
PORT OUTPUT DRIVE(1)
OPTION 1
OPTION 2
OPTION 3
X
X
X
X
X
X
X
X
X
Notes
1. Port output drives:
a) Option 1: standard I/O.
b) Option 2: open-drain I/O.
c) Option 3: push-pull output; see “PCD33xxA Family” data sheet.
2. Port state after reset: S = Set (HIGH) and R = Reset (LOW).
PORT STATE AFTER RESET(2)
SET
RESET
X
X
X
X
X
X
Table 8 Mask options
FEATURE
ROM code: program/data
Power-on-reset voltage level: VPOR
Oscillator transconductance: gm
DESCRIPTION
Any mix of instructions and data up to ROM size of 4 kbytes.
1.2 to 3.6 V in increments of 100 mV; OFF
LOW transconductance: gmL
MEDIUM transconductance: gmM
HIGH transconductance: gmH
1998 May 11
9
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