Maxim Integrated High-Speed Microcontroller - Manual (Page 117)

High-Speed Microcontroller User’s Guide
Rev: 062210 117 of 176
Figure 10-3. I/O Port Timing for MOV Instruction
10.10 Optional Functions
Every port pin on the high-speed microcontroller has an optional special function. These functions are
individually selectable. They can also be turned on and off dynamically to suit the application. The
optional function for each port pin is described briefly below. More information about each optional
function is available in the section dealing with that function or in the appropriate data sheet.
P0.0 AD0.0 Multiplexed Address/data bus P1.0 T2 Timer 2 output pulse
P2.0 A8 MSB Address bus P3.0 RXD0 Serial Receive UART0
P0.1 AD0.1 Multiplexed Address/data bus P1.1 T2EX Timer 2 capture/reload input
P2.1 A9 MSB Address bus P3.1 TXD0 Serial Transmit UART0
P0.2 AD0.2 Multiplexed Address/data bus P1.2 RXD1 Serial Receive UART1
P2.2 A10 MSB Address bus P3.2 INT0 External Interrupt 0 active low
P0.3 AD0.3 Multiplexed Address/data bus P1.3 TXD1 Serial Transmit UART1
P2.3 A11 MSB Address bus P3.3 INT1 External Interrupt 1 active low
P0.4 AD0.4 Multiplexed Address/data bus P1.4 INT2 External Interrupt 2 rising edge active
P2.4 A12 MSB Address bus P3.4 T0 Timer 0 input
P0.5 AD0.5 Multiplexed Address/data bus P1.5 INT3 External Int. 3 falling edge active
P2.5 A13 MSB Address bus P3.5 T1 Timer 1 input
P0.6 AD0.6 Multiplexed Address/data bus P1.6 INT4 External Interrupt 4 rising edge active
P2.6 A14 MSB Address bus P3.6 WR Write strobe
P0.7 AD0.7 Multiplexed Address/data bus P1.7 INT5 External Int. 5 falling edge active
P2.7 A15 MSB Address bus P3.7 RD Read strobe
AD0-AD7
ALE
PSEN
PORT 2
CLK
C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4
Last Cycle of
Previous
Instr. & MOV
prefetch
MOV Cycle 1
MOV Cycle 2
& First NOP
prefetch
A0-A7 D0-D7 A0-A7 D0-D7 A0-A7 D0-D7 A0-A7 D0-D7
MOV
Op code
Address
MOV
Operand
Address
MOV
Instruction
Op code
MOV
Instruction
Operand
First NOP
Instruction
Address
A8-A15 A8-A15 A8-A15 A8-A15
P1.0
First NOP
Cycle &
Second NOP
prefetch
Second NOP
Instruction
Address
First NOP
Instruction
Op code
Second NOP
Instruction
Op code