Sequence To Enter Isp Mode/User Mode; Ack Mode; Reference Isp Circuit Diagram And Abov Supplied Isp Board - Abov MC80F0304 User Manual

MC80F0304/08/16

26.4 Sequence to enter ISP mode/user mode

Reset
min.10us
X
IN
V
DD
V
PP
logic high
ALEB
Figure 26-1 Timing diagram to enter the ISP mode
Sequence to enter ISP mode from user mode.
(If POR and R35 are enabled, the sequnence "Run the ISP S/
W"should be followed by the sequence "Power on a target sys-
tem" as shown in NOTE of chapter 26.3)

26.5 ACK mode

The ISP S/W can not detect user system clock. Users have to en-
ter a user system clock. This mode is only used when failed to de-
tect user system clock automatically.
Note: Need to connect the ACK pin to ISP B/D.

26.6 Reference ISP Circuit Diagram and ABOV Supplied ISP Board

The ISP software and hardware circuit diagram are provided at
124
ISP mode
64ms@4MHz
2 ~ 12MHz
1. Power off a target system.
2. Configure a target system as ISP mode.
3. Attach a ISP B/D into a target system.
4. Power on a target system.
5. Run the ISP S/W.
S
Sequence to enter user mode from ISP mode.
1. Close the ISP S/W..
2. Power off a target system.
3. Configure a target system as user mode
4. Detach a ISP B/D from a target system.
5. Power on.
www.abov.co.kr . To get a ISP B/D, contact to sales department.
November 4, 2011 Ver 2.12