參數(shù)資料
型號: MC68HC05JB3JP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 64/148頁
文件大小: 1600K
代理商: MC68HC05JB3JP
GENERAL RELEASE SPECIFICATION
November 5, 1998
MOTOROLA
MEMORY
MC68HC05JB3
2-2
REV 1
2.1
I/O AND CONTROL REGISTERS
The I/O and Control Registers reside in locations $0000 to $003F. The bit assign-
ments for each register are shown in Figure 2-2, Figure 2-3, Figure 2-4, and
Figure 2-5. Reading from unused bits will return unknown states, and writing to
unused bits will be ignored.
2.2
RAM
The user RAM consists of 144 bytes (including the stack) at locations $0080 to
$012F. The stack begins at address $00FF and proceeds down to $00C0. Using
the stack area for data storage or temporary work locations requires care to pre-
vent it from being overwritten due to stacking from an interrupt or subroutine call.
2.3
ROM
There are a total of 3k-bytes of ROM on chip. This includes 2560 bytes of user
ROM with locations $1400 to $1DFF for user program storage and 16 bytes for
user vectors at locations $1FF0 to $1FFF. Also, 496 bytes of Self-check ROM on
chip at locations $1E00 to $1FEF.
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