Port Control Register; Table 25-9 Port Control Register Descriptions - Motorola DragonBall MC9328MX1 Reference Manual

SmartCard Interface Module (SIM)

25.6.1 Port Control Register

The bit descriptions and settings for the Port Control Register (PORT_CNTL) are provided in Table 25-9.
PORT_CNTL
BIT 31 30 29
TYPE r r r
0 0 0
RESET
BIT 15 14 13
TYPE r r r
0 0 0
RESET
Name
Reserved Reserved—These bits are reserved and should read 0.
Bits 31–7
3VOLT 3 Volt SIM Card—This bit is used to configure the transmit pin as
Bit 6 bi-directional allowing the Receive pin to be re-used as General
Purpose I/O. This operation is restricted to the 3 V SIM card. In
addition, the MC9328MX1 SIM I/O must operate at 2.7 V in this
mode.
Note: This bit must not be changed when the receiver or
transmitter is enabled.
SCSP SIM Card Clock Stop Polarity—Used to control the polarity of the
Bit 5 idle SIM clock when the clock is disabled by SCEN. It will be forced
low by hardware during the auto powerdown sequence. This
forces the clock be a logic 0 when stopped by auto powerdown as
required by the ISO 7816 specification.
SCEN SIM Card Clock Enable—Used to enable/disable the clock to the
Bit 4 SIM card. It can be forced low by hardware during the auto
powerdown sequence.
SRST SIM Reset—Used to control the state of the reset line to the SIM
Bit 3 card. It can be forced low by hardware during the auto powerdown
sequence. SIM card reset inputs are active low.
STEN SIM Card Transmit Enable—Used to enable/disable the XMT
Bit 2 data to the SIM card. It can be forced low by hardware during the
auto powerdown sequence.
25-22
Port Control Register
28 27 26 25 24
r r r r r
0 0 0 0 0
12 11 10 9 8
r r r r r
0 0 0 0 0
Table 25-9. Port Control Register Descriptions
Description
MC9328MX1 Reference Manual
23 22 21 20
r r r r
0 0 0 0
0x0000
7 6 5 4
3VOLT SCSP SCEN
r rw rw rw
0 0 0 0
0x0000
Addr
0x00211000
19 18 17
r r r
0 0 0
3 2 1
SRST STEN SVEN SAPD
rw rw rw
0 0 0
Settings
0 = SIM card requires both
transmit and receive pins
1 = Transmit pin is
bi-directional. Port 0
receive pin is unused
0 = Clock output is low (0)
when stopped by SCEN
1 = Clock output is high (1)
when stopped by SCEN
0 = SIM card clock disabled
1 = SIM card clock enabled
0=SIM card reset inactive
1=SIM card reset active
0 = Transmit data is forced to
zero
1 = Transmit data controlled by
SIM module
MOTOROLA
16
r
0
0
rw
0