MC68HC05L28 Datasheet, PDF(25/156 Page) Motorola, Inc – Flexible general-purpose microcomputer

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MC68HC05L28 Datasheet, PDF (25/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

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2 x VDD

2

IRQ/VPP

10 Mâ¦

OSC1

PA0

RxD

4.0 MHz

VDD

OSC2

22pF

22pF

PB6

PB2

VDD

VDD

PB3

100nF

RESET

100nF

VSS

MC68HC05L28

All resistors are 10 kâ¦ unless speciï¬ed otherwise

PB3 Function

0 Jump to RAM ($81)

1 Load/ExecuteRAM

Figure 2-1 RAM bootloader circuit

Table 2-3 RAM bootloader mode jump vector (MC68HC05L28)

Address Pseudo-vector

0084 Software interrupt

Table 2-4 RAM bootloader mode jump vectors (MC68HC705L28)

Address Pseudo-vector

0083 Software interrupt

0086 IRQ

0089 Core timer

008C I2C-bus

008F Programmable timer

MC68HC05L28 MODES OF OPERATION AND PIN DESCRIPTIONS

TPG

MOTOROLA

2-3

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