l99dz80ep STMicroelectronics, l99dz80ep Datasheet - Page 47

• Manufacturer Part Number: l99dz80ep
• Description: Door Actuator Driver
• Manufacturer: STMicroelectronics

L99DZ80EP
4.2
Table 28.
4.2.1
4.3
Name OC1 OC0 A5 A4 A3 A2 A1 A0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Bit
23
Command byte
Command byte
OCx: operation code
Ax: address
Dx: data bit
Each communication frame starts with a command byte. It consists of an operating code
which specifies the type of operation (<Read>, <Write>, <Read and Clear>, <Read Device
Information>) and a 6 bit address. If less than 6 bits are required, the remaining bits are
unused but are reserved.
Operation code definition
Table 29.
The <Write Mode> and <Read Mode> operations allow access to the RAM of the device.
A <Read and Clear Mode> operation is used to read a status register and subsequently
clear its content.
The <Read Device Information> allows access to the ROM area which contains device
related information such as <ID-Header>, <Product Code>, <Silicon Version> and <SPI-
frame-ID>.
Device memory map
Table 30.
22
Address
Command byte
00h
01h
02h
OC1
21 20 19 18 17 16 15
0
0
1
1
Control Register 0
Control Register 1
Control Register 2
Operation code definition
RAM memory map
OC0
Name
0
1
0
1
Doc ID 18260 Rev 4
Read/write
Read/write High-side/ low-side and electrochrome control
Read/write Bridge recovery mode, PWM and electrochrome setup
14
Access
13
Data byte 1
12
Device enable, output bridge and H-bridge open-load
control
<Read Device Information>
11
<Read and Clear Mode>
10
<Write Mode>
<Read Mode>
Meaning
9
Functional description of the SPI
8
Content
7
6
5
Data byte 2
4
3
2
1
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