ICL7104 Intersil, ICL7104 Datasheet - Page 18

• Manufacturer Part Number: ICL7104
• Description: 14-Bit/16-Bit/ Microprocessor- Compatible/ 2-Chip/ A/D Converter
• Manufacturer: Intersil

INTEGRATOR
(UART TBRE)
(UART TBRL)
BYTE DATA
HIGH BYTE
SEN INPUT
LOW BYTE
INTERNAL
INTERNAL
INTERNAL
INTEGRATOR OUTPUT
CE/LOAD
OUTPUT
OUTPUT
STATUS
MIDDLE
CLOCK
LATCH
MODE
INPUT
MODE
MBEN
HBEN
LBEN
INTERNAL CLOCK
DATA
DATA
INTERNAL LATCH
INTERNAL MODE
HIGH BYTE DATA
STATUS OUTPUT
LOW BYTE DATA
LOW BYTE DATA
MODE INPUT
SEN INPUT
UART
NORM
CE/LOAD
HBEN
LBEN
LBEN
DON’T CARE
ZERO-CROSSING OCCURS
UART
NORM
MODE HIGH ACTIVATES
CE/LD, HBEN, LBEN
FIGURE 12. HANDSHAKE - TYPICAL UART INTERFACE TIMING
DON’T CARE
ZERO-CROSSING DETECTED
FIGURE 11. HANDSHAKE WITH SEN HELD POSITIVE
ZERO-CROSSING OCCURS
ICL8052/ICL7104, ICL8068/ICL7104
DATA VALID
THREE-STATE HIGH IMPEDANCE
ZERO-CROSSING DETECTED
SENSED
SEN
DATA VALID
THREE-STATE HIGH IMPEDANCE
5-23
DATA VALID
DISABLES OUTPUTS CE/LD, HBEN, MBEN, LBEN
DATA VALID
MODE LOW NOT IN HANDSHAKE MODE
FOR -16 MBEN SEQUENCE INSERTED HERE
SENSED
SEN
DATA VALID
DATA VALID
THREE-STATE WITH PULLUP
TERMINATES
UART MODE