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Configuring IO port

John Kielbasa

I want to set GPIO port as output push-pull. CNF bits have to bit set, the datasheet of my MM32F003 says that we have 4 options:
In output mode (MODE > 00):

00: General-purpose output push-pull
01: General-purpose output Open-drain
10: Alternate functionsoutput push-pull
11: Alternate functionsoutput Open-drain

How do I set it when in the header files only three options are defined? . For me there should be four definition why only three??

Which should I choose for CNF=00 after reset it is 01.

www.mindmotion.com.cn/.../UM_MM32F003_q_EN.pdf

#define  GPIO_CRL_CNF                        ((uint32_t)0xCCCCCCCC)        /*!< Port x configuration bits */

#define  GPIO_CRL_CNF0                       ((uint32_t)0x0000000C)        /*!< CNF0[1:0] bits (Port x configuration bits, pin 0) */
#define  GPIO_CRL_CNF0_0                     ((uint32_t)0x00000004)        /*!< Bit 0 */
#define  GPIO_CRL_CNF0_1                     ((uint32_t)0x00000008)        /*!< Bit 1 */

#define  GPIO_CRL_CNF1                       ((uint32_t)0x000000C0)        /*!< CNF1[1:0] bits (Port x configuration bits, pin 1) */
#define  GPIO_CRL_CNF1_0                     ((uint32_t)0x00000040)        /*!< Bit 0 */
#define  GPIO_CRL_CNF1_1                     ((uint32_t)0x00000080)        /*!< Bit 1 */

#define  GPIO_CRL_CNF2                       ((uint32_t)0x00000C00)        /*!< CNF2[1:0] bits (Port x configuration bits, pin 2) */
#define  GPIO_CRL_CNF2_0                     ((uint32_t)0x00000400)        /*!< Bit 0 */
#define  GPIO_CRL_CNF2_1                     ((uint32_t)0x00000800)        /*!< Bit 1 */

#define  GPIO_CRL_CNF3                       ((uint32_t)0x0000C000)        /*!< CNF3[1:0] bits (Port x configuration bits, pin 3) */
#define  GPIO_CRL_CNF3_0                     ((uint32_t)0x00004000)        /*!< Bit 0 */
#define  GPIO_CRL_CNF3_1                     ((uint32_t)0x00008000)        /*!< Bit 1 */
and so far for other

 I am totally confused.