HC908JB16AD/D

MC68HC08JB16

Addendum to MC68HC908JB16 Technical Data

MC68HC08JB16

This section introduces the MC68HC08JB16, the ROM part equivalent to the

MC68HC908JB16. The entire MC68HC908JB16 data book applies to this

ROM device, with exceptions outlined below.

MCU Block Diagram

Figure 5 shows the block diagram of the MC68HC08JB16.

Memory Map

Figure 6 shows the memory map of the MC68HC08JB16.

Reserved Registers

The two registers at $FE08 and $FF09 are reserved locations on the

MC68HC08JB16.

On the MC68HC908JB16, these two locations are the FLASH control register

and the FLASH block protect register respectively.

Monitor ROM

The monitor program (monitor ROM, $FE10–$FFCF) on the MC68HC08JB16

is for device testing only.

Table 4. Summary of MC68HC08JB16 and MC68HC908JB16 Differences

MC68HC08JB16

MC68HC908JB16

Memory ($BA00–$F9FF)

16,384 bytes ROM

16,384 bytes FLASH

User vectors ($FFD0–$FFFF)

48 bytes ROM

48 bytes FLASH

Registers at $FE08 and $FE09

Not used;

locations are reserved

FLASH related registers.

$FE08 — FLCR

$FE09 — FLBPR

Monitor ROM 1 ($FA00–$FDFF)

Unimplemented

Used for testing and FLASH

programming/erasing.

Monitor ROM 2 ($FE10–$FFCF)

Used for testing purposes only.

Dual Clock Generator Module

Currently not available.

Available in 32-pin LQFP only.

32-pin LQFP currently not available.

28-pin SOIC

20-pin SOIC

32-pin LQFP

28-pin SOIC

20-pin SOIC

Notes:

1. The pin assignments are identical for both devices; see data sheet.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com