CMOSTEK NextGenRF CMT2189B, Руководство пользователя

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AN201
Rev 1.5 | 46/91 www.cmostek.com
4.1.17 TRISA (Addr:0x85)
Table 57. TRISA Register
Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
TRISA TRISA7 TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0
Reset 1 1 1 1 1 1 1 1
Type RW RW R RW RW RW RW RW
Table 58. TRISA Bit Function Description
4.1.18 TRISC (Addr:0x87)
Table 59. TRISC Register
Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
4 T0SE
Timer 0 clock source edge selection.
1 = trigger count on the falling edge of PA2/T0CKI
0 = trigger count on the rising edge of PA2/T0CKI
3 PSA
Prescaler assignment bit
1 = prescaler is assigned to WDT
0 = prescaler is assigned to Timer 0 module
2:0 PS<2:0>
Prescaler ratio selection bits
Value Timer 0 WDT
000 1:2 1:1
001 1:4 1:2
010 1:8 1:4
011 1:16 1:8
100 1:32 1:16
101 1:64 1:32
110 1:128 1:64
111 1:256 1:128
Bit Name Function
7:6 TRISA<7:6>
PORTA<7:6> port direction control bits
1 = input
0 = output
5 TRISA<5>
PORTA5 port direction control bit.
Input only, fixed to 1.
4:0 TRISA<4:0>
PORTA<4:0> port direction control bits.
1 = input
0 = output