TK68HC24 Datasheet, PDF (1/21 Pages) List of Unclassifed Manufacturers – Port Replacement Unit (PRU)

Tekmos – Preliminary
TK68HC24 PRU
Port Replacement Unit (PRU)
For 6811 – type microprocessors
Features
• Exact replacement for the Motorola MC68HC24 PRU
• Utilizes the Tekmos 6824 Core
• Replaces ports B and C of 6811 type microprocessors.
• The chip-select function allows multiple TK68HC24s to be used in systems requiring multiple parallel ports.
• 3 – 5.5 Volt Operation.
• 0 – 5 MHz Operation.
• Supports all handshake and I/O modes.
• Available in 40 PDIP (P) and 44 PLCC (FN) versions.
Description
The TK68HC24 is an exact replacement of the Motorola 68HC24.
The TK68HC24 is designed to replace the Port B and Port C functions of 6811 – type microprocessors. These
functions are lost when the 6811 type microprocessors are operated in the expanded mode. The TK68HC24
has an address re-mapping feature that allows multiple TK68HC24s to be used within a single system.
Pinout
NC
1
6 5 4 3 2 1 44 43 42 41 40
A15
2
A14
3
STRA
7
39
RESETN
A13
4
PC0
8
38
AD0
A12
5
PC1
9
37
AD1
STRA
6
PC2
10
36
AD2
PC3 11 _TK68HC24FN 35 AD3
NC
PC4
12
13
44 PLCC
34
NC
33
AD4
PC0
7
PC1
8
PC2
9
PC3
10
PC5
14
32
AD5
PC4
11
PC6
15
31
AD6
PC5
12
PC7
16
30
AD7
PC6
13
VDD
17
29
VSS
PC7
14
VDD
15
18 19 20 21 22 23 24 25 26 27 28
STRB
16
PB7
17
PB6
18
PB5
19
PB4
20
40
CSN
39
MODE
38
AS
37
E
36
R/WN
35
RESETN
34
AD0
33
AD1
32
AD2
31
AD3
30
AD4
29
AD5
28
AD6
27
AD7
26
VSS
25
IRQN
24
PB0
23
PB1
22
PB2
21
PB3
www.Tekmos.com
8/21/99