COP8AME9_14 Datasheet, PDF (13/102 Pages) Texas Instruments – COP8AME9 8-Bit CMOS Flash Microcontroller with 8k Memory, Dual Op Amps, Virtual EEPROM, Temperature Sensor, 10-Bit A/D and Brownout Reset

COP8AME9, COP8ANE9
www.ti.com
SNOS930F – MARCH 2001 – REVISED MARCH 2013
Port G is an 8-bit port. Pin G0, G2–G5 are bi-directional I/O ports. Pin G6 is always a general purpose Hi-Z input.
All pins have Schmitt Triggers on their inputs. Pin G1 serves as the dedicated WATCHDOG output with weak
pull-up if the WATCHDOG feature is selected by the Option register. The pin is a general purpose I/O if
WATCHDOG feature is not selected. If WATCHDOG feature is selected, bit 1 of the Port G configuration and
data register does not have any effect on Pin G1 setup.
G7 serves as the dedicated output pin for the CKO clock output.
There are two registers associated with the G Port, a data register and a configuration register. Therefore, each
of the 6 I/O bits (G0 - G5) can be individually configured under software control.
Since G6 is an input only pin and G7 is the dedicated CKO clock output pin, the associated bits in the data and
configuration registers for G6 and G7 are used for special purpose functions as outlined below. Reading the G6
and G7 data bits will return zeros.
The chip is placed in the HALT mode by writing a "1" to bit 7 of the Port G Data register. Similarly the chip will be
placed in the IDLE mode by writing a "1" to bit 6 of the Port G Data Register.
Writing a “1” to bit 6 of the Port G Configuration Register enables the MICROWIRE/PLUS to operate with the
alternate phase of the SK clock.
Config. Reg.
G7
Not Used
G6
Alternate SK
HALT
IDLE
Data Reg.
Port G has the following alternate features:
G7 CKO Oscillator dedicated output
G6 SI (MICROWIRE/PLUS Serial Data Input)
G5 SK (MICROWIRE/PLUS Serial Clock)
G4 SO (MICROWIRE/PLUS Serial Data Output)
G3 T1A (Timer T1 I/O)
G2 T1B (Timer T1 Capture Input)
G1 WDOUT WATCHDOG and/or Clock Monitor if WATCHDOG enabled, otherwise it is a general purpose I/O
G0 INTR (External Interrupt Input)
G0 through G3 are also used for In-System Emulation.
Port L is an 8-bit I/O port. All L-pins have Schmitt triggers on the inputs.
Port L supports the Multi-Input Wake-Up feature on all eight pins. Port L has the following alternate pin functions:
L7 Multi-Input Wake-up or T3B (Timer T3B Input)
L6 Multi-Input Wake-up or T3A (Timer T3A Input/Output)
L5 Multi-Input Wake-up or T2B (Timer T2B Input)
L4 Multi-Input Wake-up or T2A (Timer T2A Input/Output)
L3 Multi-Input Wake-up and/or RDX (USART Receive)
L2 Multi-Input Wake-up or TDX (USART Transmit)
L1 Multi-Input Wake-up and/or CKX (USART Clock) (Low Speed Oscillator Output)
L0 Multi-Input Wake-up (Low Speed Oscillator Input)
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