MC68HC901 Datasheet, PDF (11/73 Pages) Motorola, Inc – Multi-Function Peripheral

SECTION 1
INTRODUCTION
The MC68HC901 Multi-Function Peripheral (MFP) is a member of the M68000 Family
of peripherals. Unless otherwise specified, the MC68HC901 multi-function peripheral
is hereafter referred to as the MFP in this document. Many features of the MFP make
reference to the MC68000 Family of 16- and 32-bit microprocessors, which includes the
MC68HC000, MC68HC001, and the MC68EC000. These microprocessors are referred
to as the MC68000 within this document.
The MFP directly interfaces to the MC68000 via the asynchronous bus structure. Both
vectored and polled interrupt schemes are supported with the MFP providing unique vector
number generation for each of its 16 interrupt sources. Additionally, handshake lines are
provided to facilitate direct memory access controller (DMAC) interfacing. Refer to Figure
1-1 for a block diagram of the MFP.
CLK RESET V_CC GND
D0 – D7
RS1 – RS5
CS
R/W
DS
DTACK
INTERNAL CONTROL
LOGIC
CPU
BUS
I/O
INTERRUPT
CONTROL
TIMERS
C&D
TIMERS
A&B
USART
GENERAL PURPOSE
I / O INTERRUPTS
TCO
TDO
XTAL1
XTAL2
TAO
TAI
TBO
TBI
RR
SI
RC
SO
TC
TR
I0 – I7
IRQ
IEI
IEO IACK
Figure 1-1. MFP Block Diagram
MOTOROLA
MC6_F8_IGH_UC_RE9_-0_M1_FPU_BS_LOE_CR_K’_DS_IAM_GRA_AMNUAL
1-1
MC68HC901UM / AD