COPCH823CJ Datasheet, PDF (6/32 Pages) National Semiconductor (TI) – 8-bit Microcontroller with with Multi-Input Wake Up and Brown Detecter

COP820CJ Pin Assignment
Port
Pin
Typ
ALT
Funct
16 20 28
Pin Pin Pin
L0
I O MIWU CMPOUT 5 7 11
L1
I O MIWU CMPINb 6 8 12
L2
I O MIWU CMPINa 7 9 13
L3
I O MIWU
8 10 14
L4
I O MIWU
9 11 15
L5
I O MIWU
10 12 16
L6
I O MIWU
11 13 17
L7
I O MIWU MODOUT 12 14 18
G0
I O INTR
17 25
G1
IO
18 26
G2
IO
19 27
G3
I O TIO
15 20 28
G4
I O SO
11
G5
I O SK
16 2 2
G6
I SI
133
G7
I CKO
244
I0
I
7
I1
I
8
I2
I
9
I3
I
10
D0
O
19
D1
O
20
D2
O
21
D3
O
22
V_CC
GND
466
13 15 23
CKI
355
RESET
14 16 24
Pin Description
V_CC and GND are the power supply pins
CKI is the clock input This can come from an external
source a R C generated oscillator or a crystal (in conjunc-
tion with CKO) See Oscillator description
RESET is the master reset input See Reset description
PORT I is a 4-bit Hi-Z input port
PORT L is an 8-bit I O port
There are two registers associated with the L port a data
register and a configuration register Therefore each L
I O bit can be individually configured under software control
as shown below
Port L
Config
0
0
1
1
Port L
Data
0
1
0
1
Port L
Setup
Hi-Z Input (TRI-STATE)
Input with Weak Pull-up
Push-pull Zero Output
Push-pull One Output
Three data memory address locations are allocated for this
port one each for data register 00D0 configuration regis-
ter 00D1 and the input pins 00D2
Port L has the following alternate features
L0 MIWU or CMPOUT
L1 MIWU or CMPINb
L2 MIWU or CMPINa
L3 MIWU
L4 MIWU (high sink current capability)
L5 MIWU (high sink current capability)
L6 MIWU (high sink current capability)
L7 MIWU or MODOUT (high sink current capability)
The selection of alternate Port L functions is done through
registers WKEN 00C9 to enable MIWU and CNTRL2
00CC to enable comparator and modulator
All eight L-pins have Schmitt Triggers on their inputs
PORT G is an 8-bit port with 6 I O pins (G0 – G5) and 2 input
pins (G6 G7)
All eight G-pins have Schmitt Triggers on the inputs
There are two registers associated with the G port a data
register and a configuration register Therefore each G port
bit can be individually configured under software control as
shown below
Port G
Config
Port G
Data
Port G
Setup
0
0
Hi-Z Input (TRI-STATE)
0
1
Input with Weak Pull-up
1
0
Push-pull Zero Output
1
1
Push-pull One Output
Three data memory address locations are allocated for this
port one for data register 00D3 one for configuration reg-
ister 00D5 and one for the input pins 00D6 Since G6
and G7 are Hi-Z input only pins any attempt by the user to
configure them as outputs by writing a one to the configura-
tion register will be disregarded Reading the G6 and G7
configuration bits will return zeros Note that the device will
be placed in the Halt mode by writing a ‘‘1’’ to the G7 data
bit
Six pins of Port G have alternate features
G0 INTR (an external interrupt)
G3 TIO (timer counter input output)
G4 SO (MICROWIRE serial data output)
G5 SK (MICROWIRE clock I O)
G6 SI (MICROWIRE serial data input)
G7 CKO crystal oscillator output (selected by mask option)
or HALT restart input general purpose input (if clock
option is R C or external clock)
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