cop87l84bc National Semiconductor Corporation, cop87l84bc Datasheet - Page 8

• Manufacturer Part Number: cop87l84bc
• Description: 8-bit Cmos Otp Microcontrollers With 16k Memory, Comparators, And Can Interface
• Manufacturer: National Semiconductor Corporation

www.national.com
Typical Performance Characteristics
Idle I
CAN Tx0 Sink Current
Pin Descriptions
V
CKI is the clock input. The clock can come from a crystal os-
cillator (in conjunction with CKO). See Oscillator Description
section.
RESET is the master reset input. See Reset Description sec-
tion.
The device contains one bidirectional 8-bit I/O port (G), and
one 7-bit bidirectional I/O port (L) where each individual bit
may be independently configured as an input (Schmitt trig-
ger inputs on ports G and L), output or TRI-STATE
program control. Three data memory address locations are
allocated for each of these I/O ports. Each I/O port has two
associated 8-bit memory mapped registers, the CONFIGU-
RATION register and the output DATA register. A memory
mapped address is also reserved for the input pins of each
I/O port. (See the memory map for the various addresses as-
sociated with the I/O ports.) Figure 5 shows the I/O port con-
figurations for the device. The DATA and CONFIGURATION
registers allow for each port bit to be individually configured
under software control as shown below:
CC
and GND are the power supply pins.
DD
vs V
CC
DS101137-45
DS101137-47
®
under
Halt Supply Current
CAN Tx1 Source Current
8
−55˚C
PORT L is a 7-bit I/O port. All L-pins have Schmitt triggers on
the inputs.
Port L supports Multi-Input Wake Up (MIWU) on all seven
pins.
Port L has the following alternate features:
L6 MIWU or CMP2OUT or PWM0 or CAPTIN
L5 MIWU or CMP2IN− or PWM1
L4 MIWU or CMP2IN+
L3 MIWU or CMP2IN−
L2 MIWU or CMP1OUT
L1 MIWU or CMP1IN−
L0 MIWU or CMP1IN+
Port G is an 8-bit port with 5 I/O pins (G0–G5), an input pin
(G6), and one dedicated output pin (G7). Pins G0–G6 all
have Schmitt Triggers on their inputs. G7 serves as the dedi-
cated output pin for the CKO clock output. There are two reg-
Configuration
Register
T
A
0
0
1
1
+125˚C (Continued)
Register
Data
0
1
0
1
Hi-Z Input (TRI-STATE
Output)
Input with Weak Pull-Up
Push-Pull Zero Output
Push-Pull One Output
DS101137-46
DS101137-48
Port Set-Up