Preliminary
THCV245A_Rev.0.90_E
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To use GPIO (General Purpose Input/Output) pin, fault/error detection and interrupt function, “2-wire
Set&Trigger mode1” enables remote register access. Sub-Link Master device has 2-wire serial slave block and
can connect to HOST MPU, Sub-Link Slave device has 2-wire serial master block and can connect to remote side
2-wire serial slave devices.
HOST MPU can access register of Sub-Link Master device, Sub-Link Slave device and remote side 2-wire serial
slave devices.
For “from remote THCV236-Q Sub-Link Master or from remote THCV242 Sub-Link mode1 or remote
THCV244 Sub-Link mode1 to THCV245A Sub-Link Slave” access, “0x00FE” /”R_WB_MSB” and
“R_WA_MODE” Word Address and Bank setting is required at the beginning before any read access. “0x00FE”
Word Address write access from THCV236-Q, THCV242 or THCV244 is supposed to be divided into “0x00” and
“0xFE” commands by 8bit Sub-Address restriction.
Table 32.
Sub-Link Word Address control setting
Under “1Byte Word Address access” operation (0x00FE bit0=1’b1), 1Byte access to 0xFE has the same
meaning as 2Byte access to 0x00FE, being independent of “Word Address Bank MSB setting” (0x00FE
bit[6:4]). This procedure enables users to reset Word Address Bank MSB setting on 1Byte Word Address access
and Word Address Byte number setting itself.
M
aster
Master
Slave
or
S
lav e
Addr(h) Addr(h)
Bits
Register
w idth
R/W
Description
Default
related
-
0x00FE
[6:4]
R_WB_MSB
3
RW
Word Address Bank MSB setting on 1Byte Word-addr. acess from
remote Sub-Link Master (e.g. THCV236-Q)
(active only w hen R_WA_MODE=1)
3'd1=3'b001:"Word Address MSB[15:8]" bank is "8'h00"
3'd2=3'b010:"Word Address MSB[15:8]" bank is "8'h10"
3'd3=3'b011:"Word Address MSB[15:8]" bank is "8'h11"
others:Reserved
3'b0
S
-
0x00FE
[0]
R_WA_MODE
1
RW
Word Address Byte number setting
f rom remote Sub-Link Master
0:2Byte Word Address acess from remote Sub-Link Master
1:1Byte Word Address acess from remote Sub-Link Master
(THCV236-Q setting is "1")
1'b0
S
Sub-Link
