Model
MASS 2
Version
V_1.0
Prepared by
H/W
Date
22/01/2008
Subject Technical
Manual Page
22/59
In MASS2
, The 5 Rows are used (Row0 ~Row4) and The 5 Columns are used (Col 0~4)
The 3x4 and Power On Keys are on Main Body. And Soft_Left/Right, Navy key are on LCD Body.
The Figure 15 shows the circuit.
Figure 15. MASS 2 Key Scan Circuit.
General Purpose Inputs/Outputs
MT6225 offers 53 general purpose I/O pins and 4 general-purpose output pins. By setting the control registers, MCU software
can control the direction, the output value and read the input values on these pins. These GPIOs and GPOs are multiplexed
with other functionalities to reduce the pin count.
Upon hardware reset(/SYSRST), GPIOs are all configured as inputs and the following alternate usages of the GPIO pins are
enabled.
Multiplexing of Signals on GPIO
The GPIO pins can be multiplexed with other signals.
-. DAICLK, DAIPCMIN, DAIPCMOUT, DAIRST: digital audio interface for FTA
-. BPI_BUS6, BPI_BUS7, BPI_BUS8, BPI_BUS9: radio hardwired control
-. BSI_CS1: additional chip select signal for radio 3-wire interface
-. LSCK, LSA0, LSDA, LSCE0#, LSCE1#: serial display interface
-. LPCE1#: parallel display interface chip select signal
-. NRNB, NCLE, NALE, NWEB, NREB, NCEB: NAND flash control signals
-. PWM1, PWM2: pulse width modulation signal ALERTER: pulse width modulation signal for buzzer
-. IRDA_RXD, IRDA_TXD, IRDA_PDN: IrDA control signals
-. URXD2, UTXD2, UCTS2, URTS2: data and flow control signals for UART2
-. URXD3, UTXD3, UCTS3, URTS3: data and flow control signals for UART3
Summary of Contents for MASS2
Page 20: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 9 11 ...
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Page 88: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 7 42 ...
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