Etron Interface; Block Description - Renesas SH7727 General Information Manual

R0P7727TH003TRKE General Information Manual

5.6 eTRON Interface

5.6.1 Block Description

Figure 5.11 shows an eTRON interface control block. As shown in Figure 5.11, this control block contains an
SH7727 internal smart card interface controller (SCI), a power supply/level converter (LTC1555LEGN-1.8),
and an 8-pin connector (CN4) to interact with the eTRON card inserted into the eTRON interface connector
(CN4).
The eTRON card can be reset by controlling the SH7727 port (PTE4). The control method is shown below.
"Low" output from PTE4: The reset pin of the eTRON card is set to "Low." (Reset state)
"High" output from PTE4: The reset pin of the eTRON card is set to "High." (Normal state)
Power supply to the eTRON card is controlled via the power supply controller (H8/3048-ONE). However,
when the T-Engine board is ON, the eTRON card is being powered. When inserting or removing the eTRON
card, be sure to turn off T-Engine in advance. For more information, refer to the pertinent SH7727 Hardware
Manual.
SH7727
Smart card interface
controller (SCI)
SCK0
TXD0
RXD0
PTE4
Power supply
controller
(H8/3048F-ONE)
Figure 5.11 eTRON Interface Control Block
Power supply/level
converter
(LTC1555LEGN-1.8)
VCC
38
Functional Blocks
eTRON interface
connector (CN4)
CLK
I/O
VCC
RST