PRELIMINARY V1.8
iii
14. Port Definitions
................................................................................................65
14.1. Overview
..............................................................................................65
14.2. Read-Modify-Write Feature
.................................................................66
14.3. PCR (Port Control Register)
................................................................67
14.4. ZCR (Hi-Z Control Register)
...............................................................68
14.5. PAD Cell
..............................................................................................69
14.6. P0 (Port-0)
............................................................................................69
14.7. P2 (Port-2)
............................................................................................73
14.8. P1 (Port-1)
............................................................................................76
14.9. P3 (Port-3)
............................................................................................79
14.10. Port-4
.................................................................................................83
15. External Interrupts
...........................................................................................87
15.1. Overview
..............................................................................................87
15.2. Interrupt Control Block
........................................................................87
15.3. Interrupt Request Registers (INT0, INT1, INT2)
................................92
15.3.1 Interrupt Source Enable Registers (ISE0, ISE1, ISE2)
...........93
15.3.2 Interrupt Group Enable Register (IE)
.....................................95
15.3.3 Interrupt Priority Register (IP)
................................................95
15.3.4 Interrupt Processing
................................................................96
16. SS1102C Special Modes
..................................................................................98
16.1. TEST ROM (Using Auxiliary RAM)
..................................................98
16.2. EMULATION MODE
.........................................................................98
16.3. MULTICHIP PROGRAM MEMORY INTERFACE
..........................101
16.4. EXTERNAL MEMORY MODE
.........................................................102
17. Comparator module
.........................................................................................104
17.1. General Information
.............................................................................104
17.2. Functional Description
.........................................................................104
17.3. Block Diagram
.....................................................................................105
17.4. Comparator Control Register
...............................................................105
17.5. Comparator I/O plot
.............................................................................106
18. Power-On Reset (POR)
....................................................................................107
18.1. General
.................................................................................................107
18.2. Operation
.............................................................................................107
18.3. Crystal Oscillator Start-Up Time
.........................................................107
19. Low Battery Detect (LBD) - Low Voltage Reset
.............................................110
19.1. General Information
.............................................................................110
19.2. Functional Description
.........................................................................110
19.3. Low Battery Detect, Low Voltage Reset Control Register
..................111
19.4. TIMING DIAGRAMS
.........................................................................113
20. DC PARAMETRICS
.......................................................................................114
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