EA 9777-2USB ELECTRONIC ASSEMBLY, EA 9777-2USB Datasheet - Page 11

• Manufacturer Part Number: EA 9777-2USB
• Description: Display Development Tools Eval Board USB For Windows OS
• Manufacturer: ELECTRONIC ASSEMBLY

Specifications of EA 9777-2USB

• Product Category: Display Development Tools
• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: 3.2 in TFT Displays
• Interface Type: USB
• Operating Supply Voltage: 3.3 V, 5 V
• Description/function: Evaluation Board for USB
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 20 C
• Viewing Area: 3.2 in

ELECTRONIC ASSEMBLY reserves
the right to change specifications
without prior notice. Printing and
typographical
Request for buffer information
<DC2> = 18(dez.) = $12
<ACK> = 6(dez.) = $06
send buffer bytes ready = count of bytes stored in send buffer
receive buffer bytes free = count of bytes for free receive buffer
bcc = 1 byte = sum of all bytes incl. <DC2>, modulo 256
Protocol settings
<DC2> = 18(dec.) = $12
packet size for send buffer = 1..128 (standard: 128)
timeout = 1..255 in 1/100 seconds (standard: 200 = 2 seconds)
bcc = 1 byte = sum of all bytes incl. <DC2>, modulo 256
<ACK> = 6(dec.) = $06
Request for protocol settings
Repeat the last package
<DC2> = 18(dez.) = $12
<ACK> = 6(dez.) = $06
<DC1> = 17(dez.) = $11
len = count of user data in byte (without ckecksum, without <DC1> or <DC2>)
bcc = 1 byte = sum of all bytes incl. <DC2> and len, modulo 256
Adressing (only for RS232/RS485)
<DC2> = 18(dez.) = $12
select or deselect: 'S' = $53 or 'D' = $44
adr = 0..255
bcc = 1 byte = sum of all bytes incl. <DC2> and adr, modulo 256
<ACK> = 6(dec.) = $06
<DC2> = 18(dez.) = $12
<ACK> = 6(dez.) = $06
max. packet size = count of maximum user data for 1 package (eDIPTFT32-A = 255)
akt. send packet size = current package size for send
akt. timeout = current timeout in 1/100 seconds
bcc = 1 byte = sum of all bytes incl. <DC2>, modulo 256
>
<
<
>
<
>
<
<
>
<
<
>
<
<DC2>
<ACK>
<DC2>
<DC2>
<ACK>
<DC2>
<ACK>
<DC2>
<DC2>
<ACK>
<DC1>
<DC2>
<DC2>
<ACK>
errors
len
1
2
3
1
3
1
3
reserved.
bytes ready
packet size
send buffer
D
P
R
A
I
1 = 1(dez.) = $01
3 = 3(dez.) = $03
1 = 1(dez.) = $01
3 = 3(dez.) = $03
1 = 1(dez.) = $01
max.
packet size for
bcc
bcc
bcc
send buffer
select or
deselect
data...
receive buffer
packet size
bytes free
akt. send
I = 73(dez.) = $49
D = 68(dez.) = $44
R = 82(dez.) = $52
A = 65(dez.) = $41
P = 80(dez.) = $50
timeout
adr
bcc
bcc
akt. timeout
bcc
bcc
bcc
This is how the maximum package size that can
be sent by the display can be limited. The default
setting is a package size with up to 128 bytes of
user data. The timeout can be set in increments
of 1/100 seconds. The timeout is activated
when individual bytes get lost. The entire
package then has to be sent again.
This command queries whether user data is
ready to be picked up an how full the display's
receive buffer is.
This command is used to query protocol
settings.
If the most recently requested package
contains an incorrect checksum, the entire
package can be requested again. The reply can
then be the contents of the send buffer (<DC1>)
or the buffer/protocol information (<DC2>).
This command can be used to select or
deselect the eDIP with the address adr.
EA eDIPTFT32-A
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