Philips Semiconductors
Microcontroller with extended I/O
Product specification
PCF84C85A
8 SUMMARY OF DERIVATIVE PORTS AND REGISTERS
Table 2 Derivative Ports.
DERIVATIVE
ADDRESS
00H
01H
02H
03H
04H
TYPE
R
R
R/W
R/W
−
REGISTER
MNEMONIC
DP0L
DP1L
DP0FF
DP1FF
−
DESCRIPTION
Derivative Port 0 lines
Derivative Port 1 lines
Derivative Port 0 flip-flops
Derivative Port 1 flip-flops
Table 3 Derivative Registers.
REGISTER
MNEMONIC
DP0L
DP1L
DP0FF
DP1FF
7
D0.7
0
F0.7
0
6
D0.6
D1.6
F0.6
F1.6
5
D0.5
D1.5
F0.5
F1.5
4
D0.4
D1.4
F0.4
F1.4
3
D0.3
D1.3
F0.3
F1.3
2
D0.2
D1.2
F0.2
F1.2
1
D0.1
D1.1
F0.1
F1.1
0
D0.0
D1.0
F0.0
F1.0
9 ROM MASK OPTIONS
Program/data
ROM CODE
Port Output
P0.0 to P0.7
P1.0 to P1.7
SDA/P2.3
DP0.0 to DP0.7
DP1.0 to DP1.7
Port State after reset
P0.0 to P0.7
P1.0 to P1.7
SDA/P2.3
DP1.0 to DP1.7
DP2.0 to DP2.2
Oscillator
Transconductance
OPTION
Any mix of instructions and data up to ROM size of
8 kbytes.
standard
standard
−
standard
standard
open-drain
open-drain
open-drain
open-drain
open-drain
push-pull
push-pull
−
push-pull
push-pull
set
reset
−
set
reset
−
set
−
−
set
reset
−
set
reset
−
LOW (gmL)
MEDIUM (gmM) HIGH (gmH)
1996 Nov 21
6