Datasheet

General Description
Features
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3 Technical Data
Freescale Semiconductor General Description 29
• System protection features:
– Optional computer operating properly (COP) reset
– Optional low-voltage detection with reset
– Illegal opcode detection with reset
– Illegal address detection with reset
• Low-power design (fully static with stop and wait modes)
• Master reset pin with internal pullup and power-on reset
• External interrupt pin with programmable internal pullup (IRQ)
• 44-pin quad flat pack (QFP), 28-pin small outline integrated circuit
package (SOIC), 20-pin small outline integrated circuit package
(SOIC), and 20-pin plastic dual in-line package (DIP)
• Specific features of MC68HC908JB8 in 44-pin are:
– Port B is 8 bits: PTB0–PTB7
– Port C is 8 bits: PTC0–PTC7
– Port D is 8 bits: PTD0–PTD7
– Port E is 5 bits: PTE0–PTE4;
2-channel TIM module with TCLK input option
• Specific features of MC68HC908JB8 in 28-pin are:
– Port B is not available
– Port C is only one bit: PTC0
– Port D is only 7 bits: PTD0–PTD6
– Port E is 5 bits: PTE0–PTE4;
2-channel TIM module with TCLK input option
• Specific features of MC68HC908JB8 in 20-pin are:
– Port B is not available
– Port C is only one bit: PTC0
– Port D is only one bit: PTD0/1; internal PTD0 and PTD1 pads
are bonded together to a single pin, PTD0/1
– Port E is only 3 bits: PTE1, PTE3, and PTE4;
1-channel TIM module without TCLK input option