Z86D990 Datasheet, PDF (10/102 Pages) Zilog, Inc. – Low-Voltage Micro controllers with ADC

Z86D990/Z86D991 OTP and Z86L99X ROM
Low-Voltage Microcontrollers with ADC
3
– Three timer interrupts
– One low-battery detector flag
Operating Characteristics
• 8-MHz operation
• 3.0 V to 5.5 V operating voltage (Z86D990/Z86D991)
• 2.3 V to 5.5 V operating voltage (Z86L990/Z86L991)
• Low power consumption with three standby modes:
– Stop
– Halt
– Low Voltage Standby
• Low-battery detection flag
• Low-voltage protection circuit (also known as V_BO, or voltage brownout,
circuit)
• Watch-dog timer and power-on reset circuits
User-Programmable Option Bits
• Clock source—RC/other (LC, resonator, or crystal)
• Watch-dog timer permanently enable
• 32-kHz crystal
• Port 20–27 pull-up resistive transistor
• Port 40–42 pull-up resistive transistor
• Port 44–47 pull-up resistive transistor
• Port 50–51 pull-up resistive transistor
• Port 54–57 pull-up resistive transistor
• Port 60–63 pull-up resistive transistor (not available in Z86D991/Z86L991)
• Port 64–67 pull-up resistive transistor (not available in Z86D991/Z86L991)
• P43 high impedance in STOP mode (available in OTP only)
Force P43 to output a 1 in the open-drain configuration
PS003807-1002
PRELIMINARY