Motorola MC6805R Series - Page 3

Paragraph
Number
TABLE OF CONTENTS
Title
Section 1
Introduction
Page
Number
1.1 Device Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
1.2 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2
Section 2
Signal Description
2.1 VccandVss ..................................................... 2-1
2.2 INT.. ........ .... .... ........ ... .... . . ... .. ...... .. ... ... ..... ... 2-1
2.3 EXTALandXTAL .................................................. 2-1
2.4 TIMER ............................................................ 2-1
2.5 RESET ........................................................... 2-1
2.6 NUM (Non-User Mode) ............................................. 2-2
2.7
Vpp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-2
2.8
Input/Output Lines (PAO-PA7, PBO-PB7, PCO-PC7, PDO-P07) . . . . . . . . . . .. 2-2
Section 3
Memory Configurations
3.1 MC6805U2 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-1
3.2 MC6805R2 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-2
3.3
MC6805U3 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-3
3.4
MC6805R3 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-4
3.5
MC68705U3 and MC68705U5 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-5
3.6
MC68705R3 and MC68705R5 Memory Map ............................ 3-6
3.7
Shared Stack Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-7
3.8
Central Processing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-7
4.1.
4.2
4.3
4.4
4.5
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
Section 4
Programmable Registers
Accumulator (A) .................................................. .
Index Register (X) ................................................. .
Program
Counter (PC) ............................................. .
Stack Pointer (SP) ................................................. .
Condition Code Register (CC) ....................................... .
Half Carry (H) ................................................. .
Interrupt (I) ................................................... .
Negative
(N) .................................................. .
Zero
(Z) .......... , ............................................ .
Carry/Borrow (C)
iii
4-1
4-1
4-1
4-2
4-2
4-2
4-2
4-2
4-2
4-2